发明名称 |
Maintaining Data Consistency in Mirrored Cluster Storage Systems Using Bitmap Write-Intent Logging |
摘要 |
Techniques for maintaining mirrored storage cluster data consistency can employ write-intent logging. The techniques can be scaled to any number of mirror nodes. The techniques can keep track of any outstanding I/Os, data in caches, and data that has gone out of sync between mirrored nodes due to link failures. The techniques can ensure that a power failure on any of the storage nodes does not result in inconsistent data among the storage nodes. The techniques may keep track of outstanding I/Os using a minimal memory foot-print and having a negligible impact on the I/O performance. Properly choosing the granularity of the system for tracking outstanding I/Os can result in a minimal amount of data requiring transfer to synchronize the mirror nodes. The capability to vary the granularity based on physical and logical parameters of the storage volumes may provide performance benefits.
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申请公布号 |
US2012017040(A1) |
申请公布日期 |
2012.01.19 |
申请号 |
US201113242259 |
申请日期 |
2011.09.23 |
申请人 |
CHATTERJEE PARESH;NARAYANAN AJIT;BALAKRISHNAN NARAYANAN;JAYARAMAN RAJA;AMERICAN MEGATRENDS, INC. |
发明人 |
CHATTERJEE PARESH;NARAYANAN AJIT;BALAKRISHNAN NARAYANAN;JAYARAMAN RAJA |
分类号 |
G06F12/16;G06F12/08 |
主分类号 |
G06F12/16 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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