Dear all.
I've setup the following scenario:
Galaxy 4200 running OpenSolaris build 59 as iSCSI target; remaining
diskspace of the two internal drives with a total of 90GB is used as zpool
for the two 32GB volumes "exported" via iSCSI
The initiator is an up to date Solaris 10 11/06 x86 box using the above
mentioned volumes as disks for a local zpool.
I've now started rsync to copy about 1GB of data in several thousand
files. During the operation I took the network interface on the iSCSI
target down which resulted in no more disk IO on that server. On the other
hand, the client happily dumps data into the ZFS cache actually completely
finishing all of the copy operation.
Now the big question: we plan to use that kind of setup for email or other
important services so what happens if the client crashes while the network
is down? Does it mean that all the data in the cache is gone forever?
If so, is this a transport independent problem which can also happen if
ZFS used Fibre Channel attached drives instead of iSCSI devices?
Thanks for your help
Thomas
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