Tags:
view all tags
<!-- keep this as a security measure: #uncomment if the subject should only be modifiable by the listed groups * Set ALLOWTOPICCHANGE = Main.TWikiAdminGroup,Main.CMSAdminGroup * Set ALLOWTOPICRENAME = Main.TWikiAdminGroup,Main.CMSAdminGroup #uncomment this if you want the page only be viewable by the listed groups * Set ALLOWTOPICVIEW = Main.TWikiAdminGroup,Main.CMSAdminGroup --> %TOC% %ICON{arrowleft}% Go to [[CMSTier3LogXX][previous page]] / [[CMSTier3LogXX][next page]] of Tier3 site log %M% ---+ 26. 07. 2012 Enforcing flexible memory limits on SGE Up to now we didn't apply memory limits on SGE but because we got 5 servers crashes in the last days now it's time to enforce them; said that I propose to: * Assign =h_vmem= values to each host according to its memory capacity, so for instance =25G= to =t3wn[10-29]= and =50G= to =t3wn[30-40]=. We'll run for each WN: * qconf -se WN * qconf -aattr exechost complex_values h_vmem=25G WN * qconf -se WN * Configure the =h_vmem= complex like a forced consumable with a default value; so switching: * its =consumable= property from =NO= to =YES= * its =requestable= property from =YES= to =FORCED= * its default value from =0= to =3G=. * Run =qconf -sc= to see the complexes before and after the change. * For each queue =Q= configure the hard limit =h_vmem= like =4G=, so users can ask more than the default =3G= but <= =4G=. * The limit =h_vmem= is per server slot and it's an effective method to enforce an upper limit on =h_vmem= but even better we might program a =JVS= to reject the unsatisfiable job requests instead to leave them queued forever. * Our =JSV= can be installed like a forced check into =/gridware/sge/util/sge_request=. * We modify the file =/etc/security/limits.conf= to enforce the memory the limit '@cms as 4500000' like a final security mechanism would be SGE stop to respect its =h_vmem= deal or becasue of an SGE Admin misconfiguration. -- Main.FabioMartinelli - 2012-07-26 ---------------- %ICON{arrowleft}% Go to [[CMSTier3LogXX][previous page]] / [[CMSTier3LogXX][next page]] of Tier3 site log %M%
Edit
|
Attach
|
Watch
|
P
rint version
|
H
istory
:
r4
<
r3
<
r2
<
r1
|
B
acklinks
|
V
iew topic
|
Raw edit
|
More topic actions...
Topic revision: r1 - 2012-07-26
-
FabioMartinelli
CmsTier3
Log In
CmsTier3 Web
Create New Topic
Index
Search
Changes
Notifications
Statistics
Preferences
User Pages
Main Page
Policies
Monitoring Storage Space
Monitoring Slurm Usage
Physics Groups
Steering Board Meetings
Admin Pages
AdminArea
Cluster Specs
Home
Site map
CmsTier3 web
LCGTier2 web
PhaseC web
Main web
Sandbox web
TWiki web
CmsTier3 Web
Create New Topic
Index
Search
Changes
Notifications
RSS Feed
Statistics
Preferences
P
View
Raw View
Print version
Find backlinks
History
More topic actions
Edit
Raw edit
Attach file or image
Edit topic preference settings
Set new parent
More topic actions
Account
Log In
Edit
Attach
Copyright © 2008-2024 by the contributing authors. All material on this collaboration platform is the property of the contributing authors.
Ideas, requests, problems regarding TWiki?
Send feedback