From: L, Raghunath (Raghunath) (lraghunath@lucent.com)
Date: Mon Nov 28 2005 - 05:02:37 EST
Hi Managers,
I forgot to put the file argument
Please try /bin/date;/usr/sbin/mkfie 1024m file1 ;/bin/date or
time /usr/sbin/mkfie 1024m file1
Thanks to Simon Burr for pointing the mistake.
--
Sincerely,
Raghu
SDE Team
<>Fix the problem, not the blame. <>
-----Original Message-----
From: L, Raghunath (Raghunath)
Sent: Monday, November 28, 2005 1:08 PM
To: 'sunmanagers@sunmanagers.org'
Subject: Disk write time.
Hi Managers,
I have done a small expariment with storage to check the time taken
for creating 1Gb file in
Location Time taken
1) /tmp (Memory is the fastest) - 3 seconds
2) T3+ ( Veiritas managed Vol)- 40 seconds
3) T3+ ( Not Veritas Vol )-20 seconds
4) 3510 ( Veritas managed)-40 seconds
5) Cheethah 10RPM internal disk of V20Z-20 seconds
6) Internal disk of 4 year old E420 R- 30 seconds
T3+ and 3510 have raid five+ volumeslicing enabled.
T3+ has 1GB Cache and 3510 has 2GB cache
T3+ FC is at 1GBPS and 2GBPS for 3510
qlogic swithes used here are in serial loop
If you have SAN or direct attached storage with you can you please
try this
/bin/date;/usr/sbin/mkfie 1024m;/bin/date # this will create a 1Gb
file sp please make sure you have enough space before trying this.
I am bit surprised by the time taken by T3+ and 3510 as it looks
like it's on the slower side compaed to even internal drive of the old
server.
--
Sincerely,
Raghu
SDE Team
<>Fix the problem, not the blame. <>
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