I've just generated some data for an upcoming blog entry on
the subject. This is about a small file tar extract :
All times are elapse (single 72GB SAS disk)
Local and memory based filesystems
tmpfs : 0.077 sec
ufs : 0.25 sec
zfs : 0.12 sec
NFS service that can end up corrupting client's view of data:
nfs/ufs : 7 sec (write cache enable)
nfs/zfs : 4.2 sec (write cache enable, zil_disable=1)
nfs/zfs : 4.7 sec (write cache disable, zil_disable=1)
NFS service that will not corrupt the client's view:
nfs/ufs : 17 sec (write cache disable)
nfs/zfs : 12 sec (write cache disable, zil_disable=0)
nfs/zfs : 7 sec (write cache enable, zil_disable=0)
ZFS numbers tend to have more variability from run to run
than UFS. I still need to plow through the data to figure a
few things out. Watch this space for more info...
-r
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