CN103064632B - Solid state hard disc and virtual method, system - Google Patents
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Abstract
The present invention is applicable to technical field of memory, provide a kind of solid state hard disc and virtual method, system, for turning to multiple independently logic hard disk by virtual for solid state hard disc, solid state hard disc virtual method comprises: solid state hard disc drives the space request instruction receiving virtual server and send, and space request instruction comprises asked physical space size; The software conversion layer of solid state hard disc distributes flash memory physical space and virtual hard disk ID according to space request instruction, and creates the logical physical address mapping table corresponding with flash memory physical space; Solid state hard disc is driven by solid state hard disc and sends virtual hard disk registration request to virtual server, virtual server registration virtual hard disk.Whereby, the present invention can turn to multiple independently logic hard disk by virtual for solid state hard disc, improves the service efficiency of resource, shortens I/O path, improve I/O performance.
Description
Technical field
The present invention relates to technical field of memory, particularly relate to a kind of solid state hard disc and virtual method, system.Background technology
SSD (SolidStateDisk, solid state hard disc) be a kind of memory device of new generation be based upon on the non-volatile storage medium bases such as standard NANDFlash, complete semiconductor transformation, mechanical structure, there is low-power consumption, noiselessness, anti-vibration, the feature such as low in calories, there is not disk seek time, data access speed is fast, data throughout energy and IOPS (Input/OutputOperationsPerSecond, the i.e. number of times carrying out read-write operation per second) can reach thousands of times of conventional hard.Along with NANDFlash manufacturing technology improves constantly and the reduction of cost, significantly reduce the cost of SSD, advance the application popularization of SSD.
The read-write unit of flash memory is page, and the size of page is generally 4KB or 8KB, but it is (512Byte) that undertaken by the sector size of conventional hard that operating system reads and writes data, SSD passes through FTL (FlashTranslationLayer, flash translation layer (FTL)) the operation of the paired flash memory of independent sector operation transformation to disk.General, FTL layer can safeguard an overall address mapping table, realizes the conversion from LBA (logical block addresses) to PBA (physical block address) by address maps.
Along with the continuous increase that virtualization applications is disposed, extensive work is put into by using Intel Virtualization Technology to improve in the validity of hardware resource utilization (such as applying execution) by whole industry.In industry, major part is all shared by software simulation for virtualized technology, to meet the demand of virtual machine.Virtual machine (VirtualMachine) refer to by software simulation have complete hardware system function, the complete computer operated in a completely isolated environment.Pass through software virtual machine, one or more virtual computing machine can be simulated on a physical computer, these virtual machines carry out work just as real computing machine completely, such as: can installing operating system, set up applications, accesses network resource etc.For user, virtual machine just operates in an application program on physical computer, but for the application program run in virtual machine, virtual machine is exactly a real computing machine.
In the virtual machine implementation of conventional solid-state hard disk, SSD is generally just applied in virtualized environment as high speed storing medium or buffer memory acceleration equipment, and the storing virtual layer of virtual machine server is that virtual machine maps out virtual disk and carries out I/O (I/O) scheduling.As shown in Figure 1, SSD, then to be virtualized as multiple hard disk by software simulation layer (comprising storing virtual layer) by virtual machine server identification as common hard disk.If the application in virtual machine server gets around software simulation layer, may have access to whole SSD, poor stability.During virtual machine server accesses virtual hard disk, first send I/O request to software simulation layer, software simulation layer analysis I/O asks, and according to the address amendment I/O request of virtual hard disk I/O in whole SSD, resends to SSD, I/O performance lower.
In summary, in actual use, obviously there is inconvenience and defect, so be necessary to be improved in the virtual method of existing solid state hard disc.
Summary of the invention
For above-mentioned defect, the object of the present invention is to provide a kind of solid state hard disc and virtual method, system, it can turn to multiple independently logic hard disk by virtual for solid state hard disc, improves the service efficiency of resource, shortens I/O path, improve I/O performance.
To achieve these goals, the invention provides a kind of solid state hard disc virtual method, for turning to multiple independently logic hard disk by virtual for solid state hard disc, described method comprises:
Solid state hard disc drives the space request instruction receiving virtual server and send, and described space request instruction comprises asked physical space size;
The software conversion layer of described solid state hard disc distributes flash memory physical space and virtual hard disk ID according to described space request instruction, and creates the logical physical address mapping table corresponding with described flash memory physical space;
Described solid state hard disc is driven by solid state hard disc and sends virtual hard disk registration request to described virtual server, and described virtual server registers described virtual hard disk.
According to solid state hard disc virtual method of the present invention, described method also comprises:
Virtual hard disk through registration is distributed to upper layer application by described virtual server, and the control carrying out access rights can only access to make each upper layer application the virtual hard disk distributing to it.
According to solid state hard disc virtual method of the present invention, described method also comprises:
Described virtual server receives the virtual hard disk request of access that described upper layer application is sent;
Described virtual server obtains virtual hard disk ID according to described virtual hard disk request of access, and sends to described solid state hard disc to drive described virtual hard disk ID and I/O request;
The software conversion layer of described solid state hard disc finds corresponding logical physical address mapping table according to described virtual hard disk ID, then completes the read-write operation of I/O request address according to described logical physical address mapping table.
According to solid state hard disc virtual method of the present invention, described solid state hard disc drives in the step receiving the space request instruction that virtual server is sent, and described solid state hard disc is connected with host computer, and described host computer comprises multiple virtual server.
The present invention is corresponding provides a kind of solid state hard disc virtualization system, for turning to multiple independently logic hard disk by virtual for solid state hard disc, comprising:
Virtual server, for sending space request instruction and the request registration virtual hard disk according to solid state hard disc to solid state hard disc, described space request instruction comprises asked physical space size;
Solid state hard disc, comprises solid state hard disc and drives and solid state hard disc software conversion layer,
Described solid state hard disc drives for receiving space request instruction that virtual server sends and being transmitted to described software conversion layer and for sending virtual hard disk registration request to described virtual server,
Described software conversion layer is used for distributing flash memory physical space and virtual hard disk ID according to described space request instruction, and creates the logical physical address mapping table corresponding with described flash memory physical space.
According to solid state hard disc virtualization system of the present invention, described server is also for distributing to upper layer application through the virtual hard disk of registration, and the control carrying out access rights can only access to make each upper layer application the virtual hard disk distributing to it.
According to solid state hard disc virtualization system of the present invention, described virtual server is also for receiving the virtual hard disk request of access that described upper layer application is sent; And obtain virtual hard disk ID according to described virtual hard disk request of access, and described solid state hard disc is sent to drive described virtual hard disk ID and I/O request;
The software conversion layer of described solid state hard disc, also for finding corresponding logical physical address mapping table according to described virtual hard disk ID, then completes the read-write operation of I/O request address according to described logical physical address mapping table.
According to solid state hard disc virtualization system of the present invention, described solid state hard disc is connected with host computer, and described host computer comprises multiple virtual server.
The present invention also provides a kind of solid state hard disc, comprise solid state hard disc to drive and software conversion layer, described solid state hard disc drives for receiving space request instruction that virtual server sends and being transmitted to described software conversion layer and for sending virtual hard disk registration request to described virtual server, described software conversion layer is used for distributing flash memory physical space and virtual hard disk ID according to described space request instruction, and creates the logical physical address mapping table corresponding with described flash memory physical space.
Solid state hard disc of the present invention is by when receiving the space request instruction that virtual server is sent, distribute flash memory physical space and virtual hard disk ID, and create the logical physical address mapping table corresponding with described flash memory physical space, then send virtual hard disk registration request to virtual server.Thus solid state hard disc creates multiple address mapping table by software conversion layer, each address mapping table correspondence one independently virtual hard disk, achieves and turns to multiple independently logic hard disk by virtual for solid state hard disc, improve the service efficiency of resource.In virtual server application program access virtual hard disk time, virtual server only needs to need virtual hard disk ID and I/O of access request to send to solid state hard disc, the software conversion layer of solid state hard disc finds corresponding address mapping table according to virtual hard disk ID, then completes the read-write operation of I/O request address according to address mapping table.Relative in prior art during virtual machine server accesses virtual hard disk, first send I/O request to software simulation layer, software simulation layer analysis I/O asks, according to the address amendment I/O request of virtual hard disk I/O in whole SSD, resend to the process of solid state hard disc, the present invention, when virtual server carries out data access to solid state hard disc, does not need the software simulation layer by virtual server end, shortens I/O path.Whereby, the present invention can turn to multiple independently logic hard disk by virtual for solid state hard disc, improves the service efficiency of resource, shortens I/O path, improve I/O performance.
Accompanying drawing explanation
Fig. 1 is the system chart of solid state hard disc virtualization system in prior art;
Fig. 2 is the principle assumption diagram of solid state hard disc virtualization system of the present invention;
Fig. 3 is the system chart of a kind of embodiment of solid state hard disc virtualization system of the present invention;
Fig. 4 is the process flow diagram of solid state hard disc virtual method of the present invention.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
As shown in Figure 2, a kind of solid state hard disc virtualization system 100 of the present invention, for turning to multiple independently logic hard disk by virtual for solid state hard disc, comprise virtual server 10 and solid state hard disc 20, solid state hard disc 20 comprises solid state hard disc and drives 21 and software conversion layer 22.This system can be built in the software unit in solid state hard disc 20 and computing machine, hardware cell or soft or hard combining unit.In fact, virtual server 10 refer to by software simulation have complete hardware system function, the complete computer operated in a completely isolated environment, multiple virtual server 10 can be comprised in a host computer be connected with solid state hard disc 20.
Virtual server 10, for sending space request instruction and the request registration virtual hard disk according to solid state hard disc 20 to solid state hard disc 20, space request instruction comprises asked physical space size.When concrete virtual server 10 needs to use solid state hard disc 20, first 21 are driven to send space request instruction to create virtual hard disk by solid state hard disc.
Solid state hard disc drives 21 for receiving space request instruction that virtual server 10 sends and being transmitted to software conversion layer 22 and for sending virtual hard disk registration request to virtual server 10.Solid state hard disc drives 21 to be exactly the driver of solid state hard disc 20, and for host computer operating system provides the interface using solid state hard disc 20, therefore it plays the effect of data between transfer of virtual server 10 and solid state hard disc 20, order.The command interface of customization is set in solid state hard disc 20, mutual by between responsible virtual server 10 and solid state hard disc 20 of the driver of solid state hard disc.Virtual hard disk registration request comprises space size and the virtual hard disk ID of virtual hard disk.
Software conversion layer 22 distributes flash memory physical space and virtual hard disk ID (Identity for the space request instruction driving 21 to send according to solid state hard disc, identify label number), and create the logical physical address mapping table corresponding with flash memory physical space.Because solid state hard disc 20 storage space is larger, and the physical space difference required by virtual server 10, therefore solid state hard disc 20 can originally be divided into multiple virtual hard disk usually, the corresponding independent virtual hard disk ID of each virtual hard disk and independent logical physical address mapping table, so that can distinguish according to virtual hard disk ID when virtual server 10 pairs of solid state hard discs 20 are accessed.Software conversion layer 22 is a kind of software middle layers, for flash memory simulation is become Virtual Block Device, thus can realize FAT etc. block device class file system on flash memory.Software conversion layer 22 is mainly used in carrying out address maps, garbage reclamation, wear leveling etc.Software conversion layer is construction data dummy block will first, these dummy block will are independent of erasable piece of the physics of flash memory device, then software converts the data on management flash chip to, make it look like original place to upgrade, in fact these data are stored in positions different in flash chip, last software conversion layer 22 manages flash chip physical block, carries out garbage reclamation, makes system have that some be wiped free of, clean free block for storing data.If there is multiple flash chip in system, it is one piece of logic chip that these chipsets are made into by programming mode by software conversion layer.
Solid state hard disc of the present invention creates multiple address mapping table by software conversion layer 22, and each address mapping table correspondence one independently virtual hard disk, achieves and turn to multiple independently logic hard disk by virtual for solid state hard disc 20, improve the service efficiency of resource.In virtual server 10 application program access virtual hard disk time, virtual server 10 only needs to need virtual hard disk ID and I/O of access request to send to solid state hard disc 20, the software conversion layer 22 of solid state hard disc 20 finds corresponding address mapping table according to virtual hard disk ID, then completes the read-write operation of I/O request address according to address mapping table.Relative in prior art during virtual machine server accesses virtual hard disk, first send I/O request to software simulation layer, software simulation layer analysis I/O asks, according to the address amendment I/O request of virtual hard disk I/O in whole SSD, resend to the process of solid state hard disc, the present invention, when virtual server 10 pairs of solid state hard discs 20 carry out data access, does not need, by the software simulation layer of virtual server 10 end, to shorten I/O path.Whereby, the present invention can turn to multiple independently logic hard disk by virtual for solid state hard disc 20, improves the service efficiency of resource, shortens I/O path, improve I/O performance.
Preferably, virtual server 10 is also for distributing to upper layer application (application software) through the virtual hard disk of registration, and the control carrying out access rights can only access to make each upper layer application the virtual hard disk distributing to it.Due to the operating system that solid state hard disc 20 is not directly exposed in virtual server 10, each application can only access the virtual hard disk distributing to it, and data security is greatly improved.Prior art SSD is exactly one piece of hard disk concerning the operating system of server, can read and write space above arbitrarily by LBA, and application program can have access to the space of other application programs in theory in other words.And in the present invention, when operating system access solid state hard disc 20, also need to add virtual hard disk ID, be equivalent to one deck checking many.Just as the virtual memory system of linux, each process has oneself independently memory headroom, instead of directly uses physical memory.Thus the present invention carries out rights management to virtual hard disk, each application can only access the virtual hard disk having authority, enhances data security.
Preferably, when application program access in virtual server 10 has the virtual hard disk of access rights separately, virtual server 10 also receives the virtual hard disk request of access that upper layer application is sent, and this request of access comprises the virtual hard disk ID that will access, the logical address that access and data; And obtain virtual hard disk ID according to virtual hard disk request of access, and solid state hard disc is sent to drive 21 virtual hard disk ID and I/O request; The software conversion layer 22 of solid state hard disc 20 finds corresponding logical physical address mapping table according to virtual hard disk ID, then completes the read-write operation of I/O request address according to logical physical address mapping table.
In one embodiment of the invention, as shown in Figure 3, solid state hard disc 20 comprises multiple logical storage, each logical storage in flash translation layer (FTL) 22 to having independent logical physical address mapping table (logical physical address mapping table 1 ~ logical physical address mapping table n) to be mapped to corresponding physical space, Different Logic storage area corresponds to different virtual hard disks in virtual server 10 simultaneously, as in Fig. 1, the corresponding virtual hard disk 1 of logical storage of logical physical address mapping table 1 correspondence, the corresponding virtual hard disk n of the logical storage that logical physical address mapping table n is corresponding, distinguished by virtual hard disk ID each other.And solid state hard disc 20 drives 21 to carry out alternately with virtual server 10 by solid state hard disc.
As shown in Figure 4, a kind of solid state hard disc virtual method of the present invention, for turning to multiple independently logic hard disk by virtual for solid state hard disc, it is realized by solid state hard disc virtualization system as shown in Figure 2, and described method comprises:
Step S401, solid state hard disc drives the space request instruction receiving virtual server and send, and space request instruction comprises asked physical space size.Wherein, described solid state hard disc is connected with host computer, and described host computer comprises multiple virtual server.This step drives 21 to realize by solid state hard disc.
Step S402, the software conversion layer of solid state hard disc distributes flash memory physical space and virtual hard disk ID according to space request instruction, and creates the logical physical address mapping table corresponding with flash memory physical space.This step is realized by software conversion layer 22.
Step S403, solid state hard disc is driven by solid state hard disc and sends virtual hard disk registration request to virtual server, virtual server registration virtual hard disk.This step is realized jointly by solid state hard disc driving 21 and virtual hard disk 10.
Preferably, this solid state hard disc virtual method also comprises: the virtual hard disk through registration is distributed to upper layer application by virtual server, and the control carrying out access rights can only access to make each upper layer application the virtual hard disk distributing to it.
Preferably, this solid state hard disc virtual method also comprises: virtual server receives the virtual hard disk request of access that upper layer application is sent; Virtual server obtains virtual hard disk ID according to virtual hard disk request of access, and sends to solid state hard disc to drive virtual hard disk ID and I/O request; The software conversion layer of solid state hard disc finds corresponding logical physical address mapping table according to virtual hard disk ID, then completes the read-write operation of I/O request address according to logical physical address mapping table.
The present invention also provides a kind of solid state hard disc 20, it comprises solid state hard disc and drives 21 and software conversion layer 22, and solid state hard disc drives 21 for receiving space request instruction that virtual server 10 sends and being transmitted to software conversion layer 22 and for sending virtual hard disk registration request to virtual server 10; Software conversion layer 22 for distributing flash memory physical space and virtual hard disk ID according to space request instruction, and creates the logical physical address mapping table corresponding with flash memory physical space.This solid state hard disc 20 is described in detail above, therefore does not repeat them here.
In sum, solid state hard disc of the present invention is by when receiving the space request instruction that virtual server is sent, distribute flash memory physical space and virtual hard disk ID, and create the logical physical address mapping table corresponding with described flash memory physical space, then send virtual hard disk registration request to virtual server.Thus solid state hard disc creates multiple address mapping table by software conversion layer, each address mapping table correspondence one independently virtual hard disk, achieves and turns to multiple independently logic hard disk by virtual for solid state hard disc, improve the service efficiency of resource.In virtual server application program access virtual hard disk time, virtual server only needs to need virtual hard disk ID and I/O of access request to send to solid state hard disc, the software conversion layer of solid state hard disc finds corresponding address mapping table according to virtual hard disk ID, then completes the read-write operation of I/O request address according to address mapping table.Relative in prior art during virtual machine server accesses virtual hard disk, first send I/O request to software simulation layer, software simulation layer analysis I/O asks, according to the address amendment I/O request of virtual hard disk I/O in whole SSD, resend to the process of solid state hard disc, the present invention, when virtual server carries out data access to solid state hard disc, does not need the software simulation layer by virtual server end, shortens I/O path.Whereby, the present invention can turn to multiple independently logic hard disk by virtual for solid state hard disc, improves the service efficiency of resource, shortens I/O path, improve I/O performance.
Certainly; the present invention also can have other various embodiments; when not deviating from the present invention's spirit and essence thereof; those of ordinary skill in the art are when making various corresponding change and distortion according to the present invention, but these change accordingly and are out of shape the protection domain that all should belong to the claim appended by the present invention.
Claims (7)
1. a solid state hard disc virtual method, for turning to multiple independently logic hard disk by virtual for solid state hard disc, it is characterized in that, described method comprises:
Solid state hard disc drives the space request instruction receiving virtual server and send, and described space request instruction comprises asked physical space size;
The software conversion layer of described solid state hard disc distributes flash memory physical space and virtual hard disk ID according to described space request instruction, and creates the logical physical address mapping table corresponding with described flash memory physical space and described virtual hard disk ID;
Described solid state hard disc is driven by solid state hard disc and sends virtual hard disk registration request to described virtual server, and described virtual server registers described virtual hard disk;
Described solid state hard disc is connected with host computer, and described host computer comprises multiple virtual server.
2. solid state hard disc virtual method according to claim 1, is characterized in that, described method also comprises:
Virtual hard disk through registration is distributed to upper layer application by described virtual server, and the control carrying out access rights can only access to make each upper layer application the virtual hard disk distributing to it.
3. solid state hard disc virtual method according to claim 2, is characterized in that, described method also comprises:
Described virtual server receives the virtual hard disk request of access that described upper layer application is sent;
Described virtual server obtains virtual hard disk ID according to described virtual hard disk request of access, and sends to described solid state hard disc to drive described virtual hard disk ID and I/O request;
The software conversion layer of described solid state hard disc finds corresponding logical physical address mapping table according to described virtual hard disk ID, then completes the read-write operation of I/O request address according to described logical physical address mapping table.
4. a solid state hard disc virtualization system, for turning to multiple independently logic hard disk by virtual for solid state hard disc, is characterized in that, comprise:
Virtual server, for sending space request instruction and the request registration virtual hard disk according to solid state hard disc to solid state hard disc, described space request instruction comprises asked physical space size;
Solid state hard disc, comprises solid state hard disc and drives and solid state hard disc software conversion layer,
Described solid state hard disc drives for receiving space request instruction that virtual server sends and being transmitted to described software conversion layer and for sending virtual hard disk registration request to described virtual server;
Described software conversion layer is used for distributing flash memory physical space and virtual hard disk ID according to described space request instruction, and creates the logical physical address mapping table corresponding with described flash memory physical space and described virtual hard disk ID;
Described solid state hard disc is connected with host computer, and described host computer comprises multiple virtual server.
5. solid state hard disc virtualization system according to claim 4, it is characterized in that, described server is also for distributing to upper layer application through the virtual hard disk of registration, and the control carrying out access rights can only access to make each upper layer application the virtual hard disk distributing to it.
6. solid state hard disc virtualization system according to claim 5, is characterized in that,
Described virtual server is also for receiving the virtual hard disk request of access that described upper layer application is sent; And obtain virtual hard disk ID according to described virtual hard disk request of access, and described solid state hard disc is sent to drive described virtual hard disk ID and I/O request;
The software conversion layer of described solid state hard disc, also for finding corresponding logical physical address mapping table according to described virtual hard disk ID, then completes the read-write operation of I/O request address according to described logical physical address mapping table.
7. a solid state hard disc, is characterized in that, comprises solid state hard disc and drives and software conversion layer,
Described solid state hard disc drives for receiving space request instruction that virtual server sends and being transmitted to described software conversion layer and for sending virtual hard disk registration request to described virtual server, described solid state hard disc is connected with host computer, and described host computer comprises multiple virtual server;
Described software conversion layer is used for distributing flash memory physical space and virtual hard disk ID according to described space request instruction, and creates the logical physical address mapping table corresponding with described flash memory physical space and described virtual hard disk ID.
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| CN103336669B (en) * | 2013-05-21 | 2015-12-02 | 华中科技大学 | A kind of I/O dispatching method based on solid-state disk internal concurrency and scheduler |
| US9792221B2 (en) * | 2013-11-22 | 2017-10-17 | Swarm64 As | System and method for improving performance of read/write operations from a persistent memory device |
| CN103744612A (en) * | 2013-12-17 | 2014-04-23 | 记忆科技(深圳)有限公司 | Simplified configuration method based on flash memory conversion layer and system thereof |
| JP6338257B2 (en) * | 2013-12-31 | 2018-06-06 | 華為技術有限公司Ｈｕａｗｅｉ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｃｏ．，Ｌｔｄ． | Network element data access method and apparatus, and network management system |
| CN104102458B (en) * | 2014-06-27 | 2017-11-10 | 北京兆易创新科技股份有限公司 | Load-balancing method, multi-core CPU and the solid state hard disc of multi-core CPU |
| CN104125292A (en) * | 2014-08-06 | 2014-10-29 | 曙光信息产业(北京)有限公司 | Data processing device, cloud server and use method thereof |
| US10235198B2 (en) | 2016-02-24 | 2019-03-19 | Samsung Electronics Co., Ltd. | VM-aware FTL design for SR-IOV NVME SSD |
| CN106502584B (en) * | 2016-10-13 | 2019-10-25 | 记忆科技(深圳)有限公司 | A method of improving the utilization rate of solid state hard disk write buffer |
| CN110287076A (en) * | 2018-03-19 | 2019-09-27 | 北京兆易创新科技股份有限公司 | A kind of method for testing memory and device |
| CN111324414B (en) * | 2018-12-17 | 2024-03-26 | 北京忆芯科技有限公司 | NVM storage media emulator |
| CN111063387B (en) * | 2019-12-29 | 2021-08-31 | 苏州浪潮智能科技有限公司 | Method, device and equipment for testing performance of solid state disk and storage medium |
| CN111198663B (en) * | 2020-01-03 | 2022-09-20 | 苏州浪潮智能科技有限公司 | Method, system, apparatus and storage medium for controlling data access operation |
| CN112947867A (en) * | 2021-04-06 | 2021-06-11 | 苏州菲瑞斯信息技术有限公司 | Full flash memory array high-performance storage system and electronic equipment |
| CN116360711B (en) * | 2023-06-02 | 2023-08-11 | 杭州沃趣科技股份有限公司 | Distributed storage processing method, device, equipment and medium |
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