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Paper ID: 360 Trail: A Fast Synchronous Write Disk Subsystem Using Track-Based Logging
| Content Provider | CiteSeerX |
|---|---|
| Author | Chiueh, Tzi-Cker Huang, Lan |
| Abstract | Synchronous disk write presents a serious performance problem for those applications that require strong data integrity guarantee. This paper describes the design and im-plementation of Trail, a disk subsystem that features a track-based logging technique to minimize the performance impact of synchronous disk write operations. We have demonstrated in this research that Trailcan reduce the latency of a synchronous disk write operation to close to data transfer delay only, the absolute theoretical minimum. Trailfirst buffers an incoming synchronous disk write request at a persistent logging disk, and asynchronously performs the write operation to a normal data disk. As a result, the performance of synchronous disk write is improved significantly without any compro-mise in data integrity. In the event of system failures, Trail’s data recovery mechanism guarantees the integrity of data blocks that are buffered at the log disk but not yet com-mitted to the actual data disk at the time of failure. The current Trailimplementation is embedded within a SCSI device driver and is thus completely transparent to the rest of the kernel, including the file system. Measured performance results from the first operational Trailprototype under Linux show that the Trail-based file system is more than an order of magnitude faster in synchronous disk write latency than the standard Linux file system without Trail, while offering the same level of integrity guarantee. At the application level, the TPC-C performance of a Trail-based transaction processing system is on average 2.7 times better than one based on standard disk subsystem. |
| File Format | |
| Access Restriction | Open |
| Subject Keyword | Paper Id Synchronous Disk Write Operation Synchronous Disk Write Standard Disk Subsystem Scsi Device Driver Performance Result Actual Data Disk Integrity Guarantee Data Block Standard Linux File System Current Trailimplementation Disk Subsystem Normal Data Disk Trail-based File System Log Disk Track-based Logging Technique Tpc-c Performance Performance Impact System Failure Trail-based Transaction Processing System Data Integrity Write Operation Absolute Theoretical Minimum Trail Data Recovery Mechanism Incoming Synchronous Disk Persistent Logging Disk Application Level Synchronous Disk Write Latency Serious Performance Problem First Operational Trailprototype File System Strong Data Integrity Guarantee |
| Content Type | Text |
| Resource Type | Article |
