by yls1 » Fri, 07 Feb 2003 10:31:40
by Doug Freyburg » Sat, 08 Feb 2003 00:48:02
> hi, on jfs, i can increase file system online without dismounting but
> on vxfs, i realized that i cant do so...
Pick one: 1) You need more Veritas modules installed and licensed. 2) You
need to look through more documentation to see how to do it.
My guess is number one in this case.
by lao.ignac » Wed, 12 Feb 2003 06:30:54
> > hi, on jfs, i can increase file system online without dismounting but
> > on vxfs, i realized that i cant do so...
> On HP-UX I increase the size of mounted VXFS filesystems regularly. When
I
> worked on Solaris full time, I increased the size of mounted VXFS
filesystems
> regularly as well. On-line filesystem growth is an additional module on
> HP-UX. I don't recall if it is on Solaris.
> Pick one: 1) You need more Veritas modules installed and licensed. 2) You
> need to look through more documentation to see how to do it.
> My guess is number one in this case.
1. RAID 10 jfs: surprisingly different bonnie++ file creation times
I'm benchmarking two different disk subsystems on the same server. One
is a 4-disk RAID 10 with 10k drives, the other is a 12-disk RAID 10
with 15k drives. Both have JFS and use MegaRAID controllers for
hardware RAID.
I'm using bonnie++ as part of the benchmarking suite. I'm seeing
results that I expect for file I/O tests. The 12-disk RAID 10 is much
faster for sequential output, as I would expect.
The strange part is that for file creation, the numbers for the 4-disk
RAID 10 are high enough compared to the 12-disk RAID 10 that it's cause
for concern.
At first, I thought it might have something to do with the default
bonnie++ setting of testing 0-byte files for file creation, but I was
able to duplicate the discrepancy with larger files specified.
Here's the 4-disk RAID 10 with -n 128:20000:16:512:
Version 1.03 ------Sequential Output------ --Sequential Input-
--Random-
-Per Chr- --Block-- -Rewrite- -Per Chr- --Block--
--Seeks--
Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP
/sec %CP
foo 16G 46631 94 66317 21 43116 8 43286 82 129767 12
533.6 0
------Sequential Create------ --------Random
Create--------
-Create-- --Read--- -Delete-- -Create-- --Read---
-Delete--
files:max:min /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP
/sec %CP
128:20000:16/512 4216 21 108367 100 32620 76 4682 27 95906 100
1169 4
Here's the 12-disk RAID 10 with the same arguments:
Version 1.03 ------Sequential Output------ --Sequential Input-
--Random-
-Per Chr- --Block-- -Rewrite- -Per Chr- --Block--
--Seeks--
Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP
/sec %CP
foo 16G 49728 97 132648 26 74033 13 41362 77 101426 7
596.9 0
------Sequential Create------ --------Random
Create--------
-Create-- --Read--- -Delete-- -Create-- --Read---
-Delete--
files:max:min /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP
/sec %CP
128:20000:16/512 923 4 109247 100 621 1 615 3 94779 99
577 1
One striking thing is the very low CPU usage during the file creation
and deletion on the 12-disk RAID.
Does anyone know anything I should be looking at to help shed some
light on this aspect of the benchmark?
3. different file names under different shells
5. Is it possible for a file has different names under different shells
6. X failure on server error=111 (fine yesterday)
7. search and delete different files in different directories
8. mail lost when source is pipe within cron job
9. Makefiles involving files in different directories requiring different compilers
10. Different File/Directory Priveledges for 2 Different Groups
11. syslog: Different process messages to different files?
12. different colors for different files when using the "ls" command
13. different colors for different file types