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たまには日記の一つでも。

28にしてはじめたバイオリンの記録と、ときどき日曜ハッキング

HP DL360G5 + P400i SAS RAID5 + RHEL5.1 + x86_64 + Xen + tap:aio: = extremely slow disk I/O :-<

  • file: 20MB/s
  • tap:aio: 500kB/s

ooooops....

and my work around is;

--- /usr/sbin/virt-install      2007-08-03 22:50:19.000000000 +0900
+++ /usr/sbin/virt-install-driver-file  2008-01-25 09:47:23.000000000 +0900
@@ -148,7 +148,7 @@
                     disk = size = None
                     continue
             if d.type == virtinst.VirtualDisk.TYPE_FILE and not(hvm) and virtinst.util.is_blktap_capable():
-                d.driver_name = virtinst.VirtualDisk.DRIVER_TAP
+                d.driver_name = virtinst.VirtualDisk.DRIVER_FILE
         except ValueError, e:
             print "ERROR: ", e
             disk = size = None

....anybody same experience?


(080201)
Re: [Xen-users] tap:aio Performance - Xen Source
"file:" seems not to be reliable. Wonderful. I need "tap:aio" works fine... Please anybody help...