Data Operation Method and Device

• US 20160246516A1
• Filed: 05/04/2016
• Published: 08/25/2016
• Est. Priority Date: 11/07/2013
• Status: Active Grant

• Current Assignee: Xfusion Digital Technologies Company Limited
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: Zhang, Ziqi
• Granted Patent: US 10,157,000 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06F 11/00 Error detection; Error correction; Monitoring error detection, correction or monitoring in information storage based on relative movement between record carrier and transducer G11B20/18; monitoring, i.e. supervising the progress of recording or reproducing G11B27/36; in static stores G11C29/00
• CPC Class Codes: G06F 11/1076 Parity data used in redundant arrays of independent storages, e.g. in RAID systems
• CPC Class Codes: G06F 11/14 Error detection or correction of the data by redundancy in operation G06F11/16 takes precedence
• CPC Class Codes: G06F 16/219 Managing data history or versioning querying versioned data G06F16/2474; querying temporal data G06F16/2477
• CPC Class Codes: G06F 16/2329 using versioning
• CPC Class Codes: G06F 3/0607 by facilitating the process of upgrading existing storage systems, e.g. for improving compatibility between host and storage device
• CPC Class Codes: G06F 3/061 Improving I/O performance
• CPC Class Codes: G06F 3/0613 in relation to throughput
• CPC Class Codes: G06F 3/0619 in relation to data integrity, e.g. data losses, bit errors
• CPC Class Codes: G06F 3/0634 by changing the state or mode of one or more devices
• CPC Class Codes: G06F 3/0644 Management of space entities, e.g. partitions, extents, pools
• CPC Class Codes: G06F 3/0659 Command handling arrangements, e.g. command buffers, queues, command scheduling
• CPC Class Codes: G06F 3/067 Distributed or networked storage systems, e.g. storage area networks [SAN], network attached storage [NAS]
• CPC Class Codes: G06F 3/0689 Disk arrays, e.g. RAID, JBOD

Abstract

A data operation method and device, relate to the storage field is presented. The data operation method and device can implement, during modification of a data strip in a storage device, data sending and receiving performed only for a storage device that requires modification. Other irrelevant storage devices do not consume a disk throughput and traffic, thereby reducing a disk throughput and usage of a network resource, that is, reducing a write penalty. A client sends both new and old version numbers to a storage device corresponding to a data strip that does not need to be modified, so that the corresponding storage device compares a version number of the data strip stored by the storage device with the old version number sent by the client. When the two version numbers are consistent, the version number in the storage device is updated to the received new version number.

Claims

1. A data operation method, wherein each storage device stores one strip of a data stripe, the method comprising:

sending, by a client, a first message to a storage device corresponding to a data strip that does not need to be modified, wherein the first message carries a new version number and an old version number of the data strip that does not need to be modified;

receiving, by the storage device, the first message;

comparing the old version number in the first message with a version number of the data strip in the storage device;

updating, by the storage device, the version number of the data strip in the storage device according to the new version number in the first message when the old version number in the first message is consistent with the version number of the data strip in the storage device;

sending, by the storage device to the client, a second message indicating a version number mismatch when the old version number in the first message is inconsistent with the version number of the data strip in the storage device;

sending, by the client to the storage device that sends the second message after receiving the second message, a data strip corresponding to the storage device and a version number of the data strip corresponding to the storage device;

storing, by the storage device, a received data strip; and

performing a version number update with respect to the received data strip.

2. The method according to claim 1, further comprising sending, by the client for a data strip that needs to be modified, a third message to a storage device corresponding to the data strip that needs to be modified, wherein the third message comprises the data strip that needs to be modified and a new version number corresponding to the data strip.

3. The method according to claim 2, further comprising performing, by the storage device according to content of the third message, an overwrite operation on the data strip that needs to be modified after receiving the third message.

4. A data operation system comprising:

a data operation device; and

a plurality of storage devices, wherein each storage device stores one strip of a data strip,

wherein the data operation device is configured to send a first message to storage device corresponding to a data strip that does not need to be modified, and wherein the first message carries a new version number and an old version number of the data strip that does not need to be modified;

wherein the storage device is configured to;

receive the first message, and compare the old version number in the first message with a version number of the data strip in the storage device; and

update the version number of the data strip in the storage device according to the new version number in the first message when the old version number in the first message is consistent with the version number of the data strip in the storage device; and

send a second message indicating a version number mismatch to the data operation device when the old version number in the first message is inconsistent with the version number of the data strip in the storage device;

wherein the data operation device is further configured to;

send a data strip corresponding to the storage device to the storage device that sends the second message after receiving the second message; and

send a version number of the data strip corresponding to the storage device, and

wherein the storage device is further configured to store a received data strip and perform a version number update with respect to the received data strip.

5. The data operation system according to claim 4, wherein the data operation device is further configured to send, for a data strip that needs to be modified, a third message to a storage device corresponding to the data strip that needs to be modified, and wherein the third message comprises the data strip that needs to be modified and a new version number corresponding to the data strip.

6. The data operation system according to claim 5, wherein the storage device is further configured to perform according to content of the third message an overwrite operation on the data strip that needs to be modified after receiving the third message.