Charles Hedrick wrote:
We have a server using Solaris 10. It's a pair of systems with a shared J4200,
with Solaris cluster. It works very nicely. Solaris cluster switches over
transparently.
However as an NFS server it is dog-slow. This is the usual synchronous write
problem. Setting zfs_disable fixes the problem. otherwise it can take more than
an hour to copy files that take me 2 min with our netapp.
The obvious solution is to use a flash disk for the ZIL. However I'm clueless
what hardware to use. Can anyone suggest either a flash drive that will work in
the J4200 (SATA), or some way to connect a drive to two machines so that
Solaris cluster will work? Sun used to claim that they were going to support a
flash drive in the J4200. How that statement seems to have disappeared, and
their SATA flash drive seems to be vapor, despite appearing real on the Sun web
site. (I tried to order one.)
I don't see anywhere a specific option from Sun for an SSD in the J4xxx
arrays.
HOWEVER, the Sun Storage 7210 is based on the J4400. You can try
ordering Option XTA7210-LOGZ18GB
This is the 18GB Zeus-based SSD with the 3.5" bracket for use in the
J4xxx chassis that come with the 7210.
I have no idea if this would be supported, but it certainly should work
just fine.
Optionally, you should be able to get an 18 or 32GB SSDs for EACH
machines you are using as the cluster heads, assuming their a reasonably
late-model machine (i.e. using 2.5" drives, and first offered within the
last 2 years). This IS supported. However, doing something this way
does run the risk of data loss during a failover - no data corruption,
mind you, but as the original data on the SSD in the failed machine is
unaccessible, it won't be available to the failover machine.
--
Erik Trimble
Java System Support
Mailstop: usca22-123
Phone: x17195
Santa Clara, CA
Timezone: US/Pacific (GMT-0800)
_______________________________________________
zfs-discuss mailing list
zfs-discuss@opensolaris.org
http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
