CN107562650B - Method and system for mapping physical host to storage system - Google Patents
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Abstract
The invention discloses a method and a system for mapping a physical host to a storage system, which comprises the steps of adding N virtual hosts in a host mapping processing module positioned at the upper layer of the storage system; setting host attributes for each virtual host; selecting a first virtual host which is not in a mapping state from the N virtual hosts according to the set host attributes, and mapping the physical host to the first virtual host; when the first virtual host is disconnected, selecting a second virtual host which is not in a mapping state from other virtual hosts in a normal state according to the set host attribute, and mapping the physical host to the second virtual host. Compared with the one-to-one correspondence relationship between the physical hosts and the virtual hosts in the prior art, the virtual host mapping method comprises a plurality of virtual hosts, when a first virtual host mapped by the physical host is disconnected, a second virtual host is automatically selected for mapping, and data transmission interruption is prevented, so that the safety of data transmission is ensured; and the efficiency of data transmission is improved.
Description
Technical Field
The present invention relates to the field of storage technologies, and in particular, to a method and a system for mapping a physical host to a storage system.
Background
With the development of computer technology, the application of storage systems is more and more extensive. When a plurality of physical hosts issue data to the storage device, the physical hosts in the prior art are connected with the storage device in a one-to-one correspondence manner, so that the physical hosts are mapped to virtual hosts in the storage device connected with the physical hosts, and LUN (logical unit Number, logical volume) mapping is performed on the virtual hosts, so as to know the data issuing position, thereby completing data issuing. However, in the prior art, the physical host and the storage device are in a one-to-one connection relationship, so when the connection between the physical host and the storage device is interrupted, data transmission failure is caused, data loss is caused, and the security of data transmission cannot be ensured; in addition, the physical host needs to wait for the line repair to be completed and then establish a connection relationship with the storage device again, so that the data transmission efficiency is reduced.
Therefore, how to provide a solution to the above technical problem is a problem that needs to be solved by those skilled in the art.
Disclosure of Invention
The invention aims to provide a method and a system for mapping a physical host to a storage system, which prevent data transmission interruption, ensure the safety of data transmission and improve the efficiency of data transmission.
To solve the above technical problem, the present invention provides a method for mapping a physical host to a storage system, comprising:
adding N virtual hosts in a host mapping processing module located at the upper layer of the storage system, wherein N is an integer greater than 1;
setting a host attribute for each virtual host;
selecting a first virtual host which is not in a mapping state from the N virtual hosts according to the set host attributes, and mapping the physical host to the first virtual host;
and when the first virtual host is disconnected, selecting a second virtual host which is not in a mapping state from other virtual hosts in a normal state according to the set host attribute, and mapping the physical host to the second virtual host.
Preferably, the process of selecting a first vm which is not in a mapping state from the N vms according to the set host attribute specifically includes:
and selecting a first virtual host which has the highest matching degree with the physical host and is not in a mapping state from the N virtual hosts according to the set host attributes.
Preferably, the process of selecting, from the N virtual hosts, a first virtual host that has the highest matching degree with the physical host and is not in a mapping state according to the set host attribute specifically includes:
and selecting the virtual host which is not in a mapping state and has the highest matching degree of the host attribute and the issued task of the physical host from the N virtual hosts as a first virtual host.
Preferably, after mapping the physical host to the first virtual host, before when the first virtual host is dropped, the method further comprises:
and updating the host attribute of the first virtual host according to the issued task of the physical host.
Preferably, after updating the host attributes of the first virtual host, before when the first virtual host is dropped, the method further comprises:
and obtaining a task priority issuing path according to a predetermined prefer node in M nodes in the storage system, so that the physical host issues the task through the task priority issuing path, wherein M is an integer greater than 1.
Preferably, the method further comprises:
when the prefer node has a fault, respectively matching M attributes corresponding to M nodes in the storage system with updated host attributes, and selecting a node which has the highest matching degree with the updated host attributes and is not in a matching state from other nodes in a normal state;
and obtaining a task issuing path according to the selected node so that the physical host issues the task through the task issuing path.
Preferably, the method further comprises:
and determining a third virtual host with the maximum offline times every preset time, and modifying the host attribute of the third virtual host to the host attribute of a fourth virtual host with the offline times less than that of the third virtual host.
Preferably, the method further comprises:
and receiving an adding instruction, and adding a new virtual host in the host mapping processing module.
Preferably, the method further comprises:
and receiving a deleting instruction, and deleting the virtual host appointed to be deleted in the host mapping processing module.
To solve the above technical problem, the present invention further provides a system for mapping a physical host to a storage system, including:
the adding unit is used for adding N virtual hosts in a host mapping processing module positioned at the upper layer of the storage system, wherein N is an integer greater than 1;
a setting unit configured to set a host attribute for each of the virtual hosts;
the first mapping unit is used for selecting a first virtual host which is not in a mapping state from the N virtual hosts according to the set host attributes and mapping the physical host to the first virtual host;
and the second mapping unit is used for selecting a second virtual host which is not in a mapping state from other virtual hosts in a normal state according to the set host attribute and mapping the physical host to the second virtual host when the first virtual host is disconnected.
The invention provides a method for mapping a physical host to a storage system, which comprises the steps of adding N virtual hosts in a host mapping processing module positioned at the upper layer of the storage system, wherein N is an integer greater than 1; setting host attributes for each virtual host; selecting a first virtual host which is not in a mapping state from the N virtual hosts according to the set host attributes, and mapping the physical host to the first virtual host; when the first virtual host is disconnected, selecting a second virtual host which is not in a mapping state from other virtual hosts in a normal state according to the set host attribute, and mapping the physical host to the second virtual host.
Compared with the one-to-one correspondence relationship between the physical hosts and the virtual hosts in the prior art, the invention adds the host mapping processing module on the upper layer of the storage system, and the host mapping processing module comprises a plurality of virtual hosts. When the physical hosts are mapped, one first virtual host can be selected for mapping according to host attributes of a plurality of virtual hosts, and when the first virtual host is disconnected, a second virtual host can be automatically selected for mapping, so that interruption of data transmission is prevented, and the safety of data transmission is ensured; in addition, the physical host can be mapped to the second virtual host without waiting for line repair, so that the data transmission efficiency is improved.
The invention also provides a system for mapping the physical host to the storage system, which has the same beneficial effects as the mapping method.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed in the prior art and the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a flow chart of a method for mapping physical hosts to a storage system according to the present invention;
FIG. 2 is a schematic structural diagram of a system for mapping physical hosts to a storage system according to the present invention.
Detailed Description
The core of the invention is to provide a method and a system for mapping a physical host to a storage system, which prevent data transmission interruption, thereby ensuring the security of data transmission and improving the efficiency of data transmission.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a flowchart illustrating a method for mapping a physical host to a storage system according to the present invention, the method including:
step S1: adding N virtual hosts in a host mapping processing module positioned at the upper layer of a storage system, wherein N is an integer greater than 1;
in consideration of the fact that the original one-to-one correspondence relationship between the physical hosts and the virtual hosts causes no selectivity and no replacement of the virtual hosts, a host mapping processing module is added at the upper layer of the storage system, a plurality of virtual hosts are added in the host mapping processing module, and the host mapping processing module is equivalent to a cluster of the virtual hosts.
Step S2: setting host attributes for each virtual host;
specifically, a plurality of attributes are set for each virtual host in the host mapping processing module, each attribute is a structural body, and the attributes are collectively referred to as host attributes. The host attributes may include an IOgroup attribute for distinguishing data distribution paths and a Type attribute for indicating the Type of the physical host, and may further include a site attribute and a Port access attribute. The host attribute specifically includes which attributes, and the present invention is not particularly limited herein, and is set according to the actual situation.
Step S3: selecting a first virtual host which is not in a mapping state from the N virtual hosts according to the set host attributes, and mapping the physical host to the first virtual host;
specifically, when there is only one physical host to be mapped, a first virtual host is first selected from the multiple virtual hosts according to the host attribute of each virtual host, and the first virtual host at this time is the mapping object of the physical host, and the physical host is mapped to the first virtual host.
When there are multiple physical host mappings, taking the existence of two physical host mappings as an example here, when there are more physical host mappings, the principle of the mapping mode is the same as that of the existence of two physical hosts. Specifically, the mapping of the two physical hosts is in a sequential order, and if the mapping of the first physical host is completed first, a first virtual host should be selected from the multiple virtual hosts as a mapping object of the first physical host, and the first physical host is mapped to the selected first virtual host. Since the selected first virtual host is in a mapping state and cannot be used as a mapping object of the second physical host, a first virtual host which is not in a mapping state is selected from the plurality of virtual hosts and is used as a mapping object of the second physical host, and then the second physical host is mapped to the first virtual host.
Step S4: when the first virtual host is disconnected, selecting a second virtual host which is not in a mapping state from other virtual hosts in a normal state according to the set host attribute, and mapping the physical host to the second virtual host.
Specifically, when the first vm is disconnected, in order to prevent interruption of data transmission, a second vm that is not in a mapping state is selected from other vms in a normal state according to a host attribute of each vm, and then the physical host is mapped to the second vm. At the moment, the second virtual host replaces the disconnected first virtual host, so that the safety of data transmission is ensured; and the mapping of the physical host to the second virtual host is not influenced after the first virtual host is disconnected, so that the data transmission efficiency is improved.
The invention provides a method for mapping a physical host to a storage system, which comprises the steps of adding N virtual hosts in a host mapping processing module positioned at the upper layer of the storage system, wherein N is an integer greater than 1; setting host attributes for each virtual host; selecting a first virtual host which is not in a mapping state from the N virtual hosts according to the set host attributes, and mapping the physical host to the first virtual host; when the first virtual host is disconnected, selecting a second virtual host which is not in a mapping state from other virtual hosts in a normal state according to the set host attribute, and mapping the physical host to the second virtual host.
Compared with the one-to-one correspondence relationship between the physical hosts and the virtual hosts in the prior art, the invention adds the host mapping processing module on the upper layer of the storage system, and the host mapping processing module comprises a plurality of virtual hosts. When the physical hosts are mapped, one first virtual host can be selected for mapping according to host attributes of a plurality of virtual hosts, and when the first virtual host is disconnected, a second virtual host can be automatically selected for mapping, so that interruption of data transmission is prevented, and the safety of data transmission is ensured; in addition, the physical host can be mapped to the second virtual host without waiting for line repair, so that the data transmission efficiency is improved.
On the basis of the above-described embodiment:
as a preferred embodiment, the process of selecting the first vm not in the mapping state from the N vms according to the set host attribute specifically includes:
and selecting a first virtual host which has the highest matching degree with the physical host and is not in a mapping state from the N virtual hosts according to the set host attributes.
In order to further improve the efficiency of data transmission, according to the host attributes of each virtual host, a first virtual host which has the highest matching degree with the physical host and is not in a mapping state can be selected from the multiple virtual hosts, and the physical host is mapped to the first virtual host.
As a preferred embodiment, the process of selecting, according to the set host attribute, a first vm which has a highest matching degree with the physical host and is not in the mapping state from the N vms specifically includes:
and selecting the virtual host which is not in a mapping state and has the highest matching degree of the host attribute and the issued task of the physical host from the N virtual hosts as the first virtual host.
Specifically, each physical host has a task to be issued by itself, the issued task of the physical host is matched with the host attribute of each virtual host, a first virtual host which is not in a mapping state and has the highest matching degree of the host attribute and the issued task of the physical host is selected from the N virtual hosts, and then the physical host is mapped to the first virtual host, so that the task issuing efficiency is improved.
As a preferred embodiment, after mapping the physical host to the first vm, before when the first vm is dropped, the method further comprises:
and updating the host attribute of the first virtual host according to the issued task of the physical host.
Specifically, although the initially established host attribute of the first vm can be well matched with the issued task of the physical host, the host attribute of the vm completely matched with the issued task of the physical host is biased, and in order to eliminate the bias, the host attribute of the first vm is updated to the host attribute of the vm completely matched with the issued task of the physical host.
As a preferred embodiment, after updating the host attributes of the first vm, before when the first vm drops, the method further comprises:
and obtaining a task priority issuing path according to a predetermined prefer node in M nodes in the storage system, so that the physical host issues the task through the task priority issuing path, wherein M is an integer greater than 1.
Specifically, the predetermined value is determined in advance, and only needs to be determined once, so that the predetermined value can be directly used later, and the predetermined value does not need to be determined again unless modified according to actual conditions. The storage system comprises a plurality of nodes, the nodes are used for controlling task issuing, the plurality of nodes comprise a pre-determined pre node, a task priority issuing path can be obtained through the pre node, and the physical host can complete the issuing of the task through the obtained task priority issuing path.
As a preferred embodiment, the method further comprises:
when a prefer node has a fault, respectively matching M attributes corresponding to M nodes in a storage system with the updated host attributes, and selecting a node which has the highest matching degree with the updated host attributes and is not in a matching state from other nodes in a normal state;
and obtaining a task issuing path according to the selected node so that the physical host issues the task through the task issuing path.
When a prefer node fails, in order to ensure the normal issue of a task, a node which is in a normal state and is not in a matching state needs to be selected to replace the failed prefer node. Specifically, the attributes of the node include a plurality of attributes, the host attribute of the updated first vm also includes a plurality of attributes, and the attributes of the node and the attributes of the first vm have the same attribute, that is, the attributes of the node and the host attribute of the first vm can be matched by the same attribute, so that the respective attributes corresponding to the nodes are respectively matched with the updated host attribute, and a node with the highest matching degree with the updated host attribute can be selected from other nodes in a normal state to replace a failed preferer node.
As a preferred embodiment, the method further comprises:
and determining a third virtual host with the maximum offline times every preset time, and modifying the host attribute of the third virtual host to the host attribute of a fourth virtual host with the offline times less than that of the third virtual host.
Specifically, the preset time is set in advance, and only needs to be determined once, and can be directly used later, and the preset time does not need to be reset unless modified according to actual conditions. In order to ensure the stability of the system, the number of times of disconnection of the virtual hosts is accumulated, the number of times of disconnection of each virtual host is compared at preset intervals, a third virtual host with the largest number of times of disconnection can be determined, and the host attribute of the third virtual host is modified to the host attribute of a fourth virtual host with the number of times of disconnection less than that of the third virtual host. The present invention is not particularly limited as to which of the virtual hosts having a number of dropped connections less than that of the third virtual host is selected as the fourth virtual host, and the number of dropped connections is determined according to actual situations.
As a preferred embodiment, the method further comprises:
and receiving an adding instruction, and adding a new virtual host in the host mapping processing module.
Specifically, after the adding instruction is received, a new virtual host is added to the host mapping processing module, so that the number of virtual hosts in the host mapping processing module is increased, and the mapping of the physical host is more selective.
As a preferred embodiment, the method further comprises:
and receiving a deleting instruction, and deleting the virtual host specified to be deleted in the host mapping processing module.
Specifically, after the deletion instruction is received, the virtual host specified for deletion in the host mapping processing module is deleted, so that unnecessary waste of storage space is avoided.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a system for mapping physical hosts to a storage system according to the present invention, the system including:
an adding unit 1, configured to add N virtual hosts in a host mapping processing module located at an upper layer of a storage system, where N is an integer greater than 1;
a setting unit 2 configured to set a host attribute for each virtual host;
the first mapping unit 3 is configured to select a first virtual host that is not in a mapping state from the N virtual hosts according to the set host attribute, and map the physical host to the first virtual host;
and the second mapping unit 4 is configured to, when the first virtual host is disconnected, select a second virtual host that is not in a mapping state from other virtual hosts in a normal state according to the set host attribute, and map the physical host to the second virtual host.
For the introduction of the system provided by the present invention, please refer to the above method embodiment, and the present invention is not repeated herein.
It should also be noted that, in the present specification, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A method of physical host mapping to a storage system, comprising:
adding N virtual hosts in a host mapping processing module located at the upper layer of the storage system, wherein N is an integer greater than 1;
setting a host attribute for each virtual host;
selecting a first virtual host which is not in a mapping state from the N virtual hosts according to the set host attributes, and mapping the physical host to the first virtual host;
when the first virtual host is disconnected, selecting a second virtual host which is not in a mapping state from other virtual hosts in a normal state according to the set host attribute, and mapping the physical host to the second virtual host;
the method further comprises the following steps:
and determining a third virtual host with the maximum offline times every preset time, and modifying the host attribute of the third virtual host to the host attribute of a fourth virtual host with the offline times less than that of the third virtual host.
2. The method according to claim 1, wherein the selecting, according to the set host attribute, the first vm that is not in the mapping state from the N vms is specifically performed by:
and selecting a first virtual host which has the highest matching degree with the physical host and is not in a mapping state from the N virtual hosts according to the set host attributes.
3. The method according to claim 2, wherein the selecting, according to the set host attributes, the first vm that has a highest matching degree with the physical host and is not in the mapping state from the N vms is specifically:
and selecting the virtual host which is not in a mapping state and has the highest matching degree of the host attribute and the issued task of the physical host from the N virtual hosts as a first virtual host.
4. The method of claim 1, further comprising, after mapping the physical host to the first VM, prior to when the first VM is dropped:
and updating the host attribute of the first virtual host according to the issued task of the physical host.
5. The method of claim 4, wherein after updating the host attributes of the first VM, prior to when the first VM is dropped, the method further comprises:
and obtaining a task priority issuing path according to a predetermined prefer node in M nodes in the storage system, so that the physical host issues the task through the task priority issuing path, wherein M is an integer greater than 1.
6. The method of claim 5, further comprising:
when the prefer node has a fault, respectively matching M attributes corresponding to M nodes in the storage system with updated host attributes, and selecting a node which has the highest matching degree with the updated host attributes and is not in a matching state from other nodes in a normal state;
and obtaining a task issuing path according to the selected node so that the physical host issues the task through the task issuing path.
7. The method of claim 1, further comprising:
and receiving an adding instruction, and adding a new virtual host in the host mapping processing module.
8. The method of claim 1, further comprising:
and receiving a deleting instruction, and deleting the virtual host appointed to be deleted in the host mapping processing module.
9. A system for physical host mapping to a storage system, comprising:
the adding unit is used for adding N virtual hosts in a host mapping processing module positioned at the upper layer of the storage system, wherein N is an integer greater than 1;
a setting unit configured to set a host attribute for each of the virtual hosts;
the first mapping unit is used for selecting a first virtual host which is not in a mapping state from the N virtual hosts according to the set host attributes and mapping the physical host to the first virtual host;
a second mapping unit, configured to select, according to the set host attribute, a second virtual host that is not in a mapping state from other virtual hosts in a normal state and map the physical host to the second virtual host when the first virtual host is disconnected;
the system is further configured to:
and determining a third virtual host with the maximum offline times every preset time, and modifying the host attribute of the third virtual host to the host attribute of a fourth virtual host with the offline times less than that of the third virtual host.
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