[BBLISA] iSCSI - opinions / experiences?

[Douglas Alan]

Eddy Harvey <bblisa2 at nedharvey.com> wrote:

> Also, I spent a fair amount of time measuring file i/o over nfs, and
> generally found it 1/8 to 1/10 as fast as block-level network access.

Did you try turning off synchronous writes?  Or using a server with a
battery-backed up write cache?  Synchronous writes to disk are sure to
make NFS writing slow.

For your performance comparisons to SAN block-level access, were you
using a cluster filesystem?  I've never used a cluster filesystem
myself, so I have no idea how they perform, but I would imagine (perhaps
incorrectly) that since they are trying to basically solve most of the
same problems as NFS, that they would suffer similar performance issues.

|>oug