Restarting method using a snapshot
First Claim
Patent Images
1. A snapshot-used restarting method for a computing system comprising:
- a plurality of active servers which are connected to a disk device including a plurality of disk drives;
at least one backup server connected to the disk device;
an administration server to which said active servers and said backup server are connected; and
each active server having means for storing a snapshot containing memory content of said each active server in said disk drives;
the method comprising said administration server performing steps of;
receiving an alert from a first active server;
determining whether said alert corresponds to a predetermined condition;
issuing an instruction to said first active server to obtain an additional snapshot in addition to a previous snapshot obtained by said first active server when it is determined that said alert corresponds to said predetermined condition;
storing said additional snapshot in a disk drive different from a disk drive that stores said previous snapshot; and
storing information in a disk management storage area that relates together said additional snapshot, said disk drive that stores said additional snapshot, and said predetermined condition,wherein when a failure occurs in one of said active servers, designated a failed active server, extracting a plurality of disk drives in which a snapshot corresponding to said failed active server is stored based on said information in said disk management storage area;
selecting a disk drive corresponding to said predetermined condition from among said extracted disk drives using said information in said disk management storage area; and
establishing a connection with and starting up said backup server.
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Accused Products
Abstract
The active server A101 notifies its own operating status to the administration server 106, and the administration server 106 acquires a snapshot and copies a disk according to the policy established by a user. When the active server A101 or the active disk 113 fails, the administration server 106 chooses a backup server A104 and a status storage disk A114 to be booted and restarts them by using the snapshot according to the policy.
74 Citations
18 Claims
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1. A snapshot-used restarting method for a computing system comprising:
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a plurality of active servers which are connected to a disk device including a plurality of disk drives; at least one backup server connected to the disk device; an administration server to which said active servers and said backup server are connected; and each active server having means for storing a snapshot containing memory content of said each active server in said disk drives; the method comprising said administration server performing steps of; receiving an alert from a first active server; determining whether said alert corresponds to a predetermined condition; issuing an instruction to said first active server to obtain an additional snapshot in addition to a previous snapshot obtained by said first active server when it is determined that said alert corresponds to said predetermined condition; storing said additional snapshot in a disk drive different from a disk drive that stores said previous snapshot; and storing information in a disk management storage area that relates together said additional snapshot, said disk drive that stores said additional snapshot, and said predetermined condition, wherein when a failure occurs in one of said active servers, designated a failed active server, extracting a plurality of disk drives in which a snapshot corresponding to said failed active server is stored based on said information in said disk management storage area; selecting a disk drive corresponding to said predetermined condition from among said extracted disk drives using said information in said disk management storage area; and establishing a connection with and starting up said backup server. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A computing system comprising:
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a plurality of active servers which are connected to a disk device including a plurality of disk drives; at least one backup server connected to the disk device; an administration server to which said active servers and said backup server are connected;
aeach active server means for storing a snapshot containing memory content of said each active server in said disk drives; said administration server configured to; receive an alert from a first active server; determine whether said alert corresponds to a predetermined condition; issue an instruction to said first active server to obtain an additional snapshot in addition to a previous snapshot obtained by said first active server when it is determined that said alert corresponds to said predetermined condition; store said additional snapshot in a disk drive different from a disk drive that stores said previous snapshot; and store information in a disk management storage area that relates together said additional snapshot, said disk drive that stores said additional snapshot, and said predetermined condition, wherein, when a failure occurs one of said active servers, a plurality of disk drives in which a snapshot corresponding to said failed active server is stored based on said information in said disk management storage area; a disk drive associated with predetermined condition among said extracted disk drives is chosen using said information in said disk management storage area; and said chosen disk drive is connected to said backup server for start up. - View Dependent Claims (15, 16, 17, 18)
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Specification