Mike, Thanks, again. Very helpful. So, did I understand your earlier statement/comment that you disagree with "*Set the LVM read-ahead to 0 for all logical volumes on disk systems that provide adaptive read-ahead capabilities, for example, enterprise-type disk systems.*"
I also read the statement "*For the Tivoli Storage Manager database and logs, use the ext3 file system.*" Whats up with that? They explain why you should use ext4 for the storage volumes but no details on ext3 for DB/logs? On Thu, Jan 28, 2016 at 1:05 PM, Ryder, Michael S <[email protected] > wrote: > Hi Zoltan > > Here is the reference... I know it is for TSM 7.1, but the reference is > specific to RHEL and it's filesystems, which is still relevant to the > discussion, I think: > > > http://www-01.ibm.com/support/knowledgecenter/SSGSG7_7.1.0/com.ibm.itsm.perf.doc/t_perf_diskos_lnx.html > > Best regards, > > Mike, x7942 > RMD IT Client Services > > On Thu, Jan 28, 2016 at 11:38 AM, Zoltan Forray <[email protected]> wrote: > > > On Wed, Jan 27, 2016 at 10:05 AM, Ryder, Michael S < > > [email protected]> wrote: > > > > > Did you follow the docs and disable RHEL's read-ahead > > > caching? If so, you may want to consider enabling it. > > > > > > > Mike, > > > > Can you expand on your statement about RHEL read-ahead cache and some > > tuning/config document you refer to? We were unaware of such a document > > (or config value). The RHEL read-ahead cache is set to the default of > > 128K. Currently all caching is via PERC. > > > > > > -- > > *Zoltan Forray* > > TSM Software & Hardware Administrator > > Xymon Monitor Administrator > > Virginia Commonwealth University > > UCC/Office of Technology Services > > www.ucc.vcu.edu > > [email protected] - 804-828-4807 > > Don't be a phishing victim - VCU and other reputable organizations will > > never use email to request that you reply with your password, social > > security number or confidential personal information. For more details > > visit http://infosecurity.vcu.edu/phishing.html > > > -- *Zoltan Forray* TSM Software & Hardware Administrator Xymon Monitor Administrator Virginia Commonwealth University UCC/Office of Technology Services www.ucc.vcu.edu [email protected] - 804-828-4807 Don't be a phishing victim - VCU and other reputable organizations will never use email to request that you reply with your password, social security number or confidential personal information. For more details visit http://infosecurity.vcu.edu/phishing.html
