Hi,
I have a bit of a NFS problem on AiX 6.1 : When I set the mount to cio and dio - needed for a database app - Everything slows down. The following is copying 700mb, top one is a normal mount bottom one is a mount with the cio/dio option enabled :
# ./a.sh
Wed Jan 11 11:41:24 GMT 2012... (5 Replies)
I understand that AIO is not something that you turn on in AIX 6.1 but I am getting a request to turn on posix aio. I am guessing a value of 0 means it's off but not sure.
root@foobar:/> ioo -a | grep active
aio_active = 1
posix_aio_active = 0
When I... (1 Reply)
Hi:
I am very sorry,I am not good at english.
Please help me,I use rhel5.3 64bit OS,I can not combine swftools-0.9.0.tar.gz; but I use rhel5.3 32bit OS,I done.
anybody have some question.
Thanks (0 Replies)
hey, I believe I once saw a post in this forum, about enable an GCC option to enable long types. I simply cannot find it any more. Can anybody give me a hint? I am on 32bit Ubuntu, and I would like my int be really long. Also I need malloc() take long int argument too.
I found it is necessary to... (6 Replies)
Hi Guys,
I wonder if after enabling CIO/DIO at the filesystem level and assuming that CIO/DIO will bypass the JFS2 read ahead available when not using CIO/DIO my questionis what parameters I can play with to tune/improve the CIO in order to obtain similar performance for sequential reads (... (7 Replies)
I just noticed from /proc/cpuinfo, it only show up 1 processor. We have at least 8 processors. How can I enable all these processors in RHEL 5.1?
cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 26
model name : Genuine... (1 Reply)
QUOTAON(8) BSD System Manager's Manual QUOTAON(8)NAME
quotaon, quotaoff -- turn filesystem quotas on and off
SYNOPSIS
quotaon [-g] [-u] [-v] filesystem ...
quotaon [-g] [-u] [-v] -a
quotaoff [-g] [-u] [-v] filesystem ...
quotaoff [-g] [-u] [-v] -a
DESCRIPTION
Quotaon announces to the system that disk quotas should be enabled on one or more filesystems. Quotaoff announces to the system that the
specified filesystems should have disk quotas turned off. The filesystem must be mounted and it must have the appropriate mount option file
located at its root, the .quota.ops.user file for user quota configuration, and the .quota.ops.group file for group quota configuration.
Quotaon also expects each filesystem to have the appropriate quota data files located at its root, the .quota.user file for user data, and
the .quota.group file for group data. These filenames and their root location cannot be overridden. By default, quotaon will attempt to
enable both user and group quotas. By default, quotaoff will disable both user and group quotas.
Available options:
-a If the -a flag is supplied in place of any filesystem names, quotaon/quotaoff will enable/disable any filesystems with an existing
mount option file at its root. The mount option file specifies the types of quotas that are to be configured.
-g Only group quotas will be enabled/disabled. The mount option file, .quota.ops.group, must exist at the root of the filesystem.
-u Only user quotas will be enabled/disabled. The mount option file, .quota.ops.user, must exist at the root of the filesystem.
-v Causes quotaon and quotaoff to print a message for each filesystem where quotas are turned on or off.
Specifying both -g and -u is equivalent to the default.
Quotas for both users and groups will automatically be turned on at filesystem mount if the appropriate mount option file and binary data
file is in place at its root.
FILES
Each of the following quota files is located at the root of the mounted filesystem. The mount option files are empty files whose existence
indicates that quotas are to be enabled for that filesystem.
.quota.user data file containing user quotas
.quota.group data file containing group quotas
.quota.ops.user mount option file used to enable user quotas
.quota.ops.group mount option file used to enable group quotas
SEE ALSO quota(1), quotactl(2), edquota(8), quotacheck(8), repquota(8)HISTORY
The quotaon command appeared in 4.2BSD.
4.2 Berkeley Distribution October 17, 2002 4.2 Berkeley Distribution
How to enable AIO and DIO on rhel5 64bit?