Login or Register to Ask a Question and Join Our Community


Red Hat

GFS file system performance is very slow

Login to Discuss or Reply to this Discussion in Our Community

 
Thread Tools Search this Thread
Operating Systems Linux Red Hat GFS file system performance is very slow
# 1  
Old 03-30-2012
Question GFS file system performance is very slow
Code:
My code

Hi All,

I am having redhat linux 5.3 (Tikanga) with GFS file system and its very very slow for executing ls -ls command also.Please see the below for 2minits 12 second takes.

Please help me to fix the issue.


Code:
$ sudo time ls -la BadFiles |wc -l
0.01user 0.26system 2:12.68elapsed 0%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+374minor)pagefaults 0swaps
445

$ mount -v

/dev/mapper/vg_etl-ETLGFS01 on /etl type gfs (rw,noatime,nodiratime,hostdata=jid=0:id=196610:first=0)
/dev/mapper/vg_etlmob-ETLMOBGFS01 on /etl_mbl type gfs (rw,noatime,nodiratime,hostdata=jid=0:id=327682:first=0)
$


$ more /etc/redhat-release
Red Hat Enterprise Linux Server release 5.3 (Tikanga)
$


Thanks,
Susi.SSmilie
Last edited by Corona688; 03-30-2012 at 12:07 PM.. Reason: code tags for code, please
# 2  
Old 03-30-2012
GFSv1 is VERY slow, mostly due to locking issues on inodes. If you use a top level single directory as your shared storage, anything inside can lock the directory inode, which causes VERY poor performance.

Shared filesystems tend to have overhead that already cost you about 12-20% performance penalties.
# 3  
Old 03-31-2012
Code:
my code

Hi Mark,

I have tuned to glock_purge=50,demote_secs=100,scand_secs=3 but still performance is low.If we are going under sub-directory ls -la is not fetching any date and its getting time out.Please advice how to resolve this issue.

Thanks,
susi.s
# 4  
Old 04-01-2012
Hi Friends,

Any idea you have about above issue??

Thanks,
Susi.S
Login or Register to Ask a Question

Previous Thread | Next Thread

8 More Discussions You Might Find Interesting

1. Solaris

Solaris 11.1 Slow Network Performance

I have identical M5000 machines that are needing to transfer very large amounts of data between them. These are fully loaded machines, and I've already checked IO, memory usage, etc... I get poor network performance even when the machines are idle or copying via loopback. The 10 GB NICs are... (7 Replies)
Discussion started by: christr
7 Replies

2. Infrastructure Monitoring

99% performance wa, slow server.

There is a big problem with the server (VPS based on OpenVZ, CentOS 5, 3GB RAM). The problem is the following. The first 15-20 minutes after starting the server is operating normally, the load average is less than or about 1.0, but then begins to increase sharply% wa, then hovers around 95-99%.... (2 Replies)
Discussion started by: draiphod
2 Replies

3. Shell Programming and Scripting

Slow performance filtering file

Please, I need help tuning my script. It works but it's too slow. The code reads an acivity log file with 50.000 - 100.000 lines and filters error messages from it. The data in the actlog file look similar to this: 02/08/2011 00:25:01,ANR2034E QUERY MOUNT: No match found using this criteria.... (5 Replies)
Discussion started by: Miila
5 Replies

4. UNIX for Dummies Questions & Answers

Slow copy/performance... between volumes

hi guys We are seeing weird issues on my Linux Suse 10, it has lotus 8.5 and 1 filesystem for OS and another for Lotus Database. the issue is when the Lotus service starts wait on top is very high about 25% percent and in general CPU usage is very high we found that when this happens if we... (0 Replies)
Discussion started by: kopper
0 Replies

5. Filesystems, Disks and Memory

Is GFS 6.2 same as GFS 2 file system?

Hi, I have a bit knowledge of GFS. As per my understanding it is the file system used in the cluster environment. I have a question. Is GFS 6.2 same as GFS 2 files system? Please some one clear my confusion. Thanks in advance. (1 Reply)
Discussion started by: praveen_b744
1 Replies

6. Filesystems, Disks and Memory

Slow Copy(CP) performance

Hi all We have got issues with copying a 2.6 GB file from one folder to another folder. Well, this is not the first issue we are having on the box currently, i will try to explain everything we have done from the past 2 days. We got a message 2 days back saying that our Production is 98%... (3 Replies)
Discussion started by: b_sri
3 Replies

7. Shell Programming and Scripting

egrep is very slow : How to improve performance

We have an egrep search in a while loop. egrep -w "$key" ${PICKUP_DIR}/new_update >> ${PICKUP_DIR}/update_record_new ${PICKUP_DIR}/new_update is 210 MB file In each iteration, the egrep on an average takes around 50-60 seconds to search. Ther'es nothing significant in the loop other... (7 Replies)
Discussion started by: hidnana
7 Replies

8. Post Here to Contact Site Administrators and Moderators

Help! Slow Performance

Is the performance now very, very slow (pages take a very long time to load)? Or is it just me? Neo (6 Replies)
Discussion started by: Neo
6 Replies
Login or Register to Ask a Question