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Not only NFS

Not only NFS

Posted Dec 29, 2008 13:51 UTC (Mon) by dag- (subscriber, #30207)
In reply to: Not only NFS by oak
Parent article: Justifying FS-Cache

Well, it's not really that slow even when it is slower than reading. Here are the stats for my Intel 80GB SSD (on a RHEL5 2.6.18 kernel) with 2 threads:

Sequential writes: 57MB/sec
Sequential reads: 170MB/sec
Random reads: 199MB/sec
Mixed workload (70%R, 30%W): 69MB/sec
Random writes: 72MB/sec

And with 16 treads:

Sequential writes: 48MB/sec
Sequential reads: 208MB/sec
Random reads: 174MB/sec
Mixed workload (70%R, 30%W): 144MB/sec
Random writes: 40MB/sec

Granted, with 16 threads the results are less flattering. But for a single disk, it is not slow compared to other laptop disks.


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