From: "Scott Harrington" <sharrington@xxxxxxxxxxxx>
Subject: [Iscsitarget-devel] Great read performance, bad write performance -
help?
Date: Fri, 27 Jan 2006 12:55:18 -0800
> Hello everyone. I am new to this list, so please accept my apology if
> this has been covered at some point in the past (I did check archives
> though). Also, I hope this is the correct place for this.
>
> I don't even know if my problem is IETD specific, but I'm fresh out of
> ideas. I will try to include as much information as possible, while
> attempting to keep it relevant. I've been trying to solve this problem
> for going on two months now with no luck.
Generally speaking, the read performance is not good because IET uses
write-through disk cache policy. You can try the following patch
though I recommend you to read the past discussions. This issues have
been discussed several times.
Index: kernel/file-io.c
===================================================================
--- kernel/file-io.c (revision 27)
+++ kernel/file-io.c (working copy)
@@ -264,7 +264,6 @@
.name = "fileio",
.attach = fileio_attach,
.make_request = fileio_make_request,
- .sync = fileio_sync,
.detach = fileio_detach,
.show = fileio_show,
};
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