Thanks for your valuable information Steffen. Saludos / Regards
Victor Echavarry System Programmer, EVERTEC LLC -----Original Message----- From: Linux on 390 Port [mailto:[email protected]] On Behalf Of Steffen Maier Sent: Thursday, June 12, 2014 6:29 AM To: [email protected] Subject: Re: VMRELOCATE problem with SAN file systems On 06/11/2014 05:54 PM, Steffen Maier wrote: > On 06/11/2014 05:00 PM, Victor Echavarry Diaz wrote: >> We install a couple of EC12 to our shop, upgrade some server to SLES >> 11 SP3 kernel 3.0.101-0.15-default under z/VM 6.2. When we execute >> the VMRELOCATE for some reason the SAN file system go read only. Our >> previous configuration was an EC10, SLES 10 SP2 under z/VM 6.2. The >> VMRELOCATE here works fine. Does anyone see this issue before? The >> SAN is an IBM V7000. The Storage, Unix and DBA groups said their >> configurations are ok. > > Just a shot in the dark: > > The builtin device-mapper multipath settings and documentation for SVC / > V7000 probably recommend something like "no_path_retry 5" in > /etc/multipath.conf. > > Since you temporarily lose all paths at the same time unavoidably during > LGR, you might need to reconfigure multipathing to always queue I/O > requests when all paths are gone instead of returning EIO (I/O error) > which in turn typically causes file systems to remount read-only (sooner > or later). Just for the records the corresponding z/VM documentation: z/VM 6.3.0 >Planning and Administration >z/VM: CP Planning and Administration >Single System Image Clusters Planning and Administration >Preparing for Guest Relocations in a z/VM SSI Cluster >Supported Configuration for Relocation http://www-01.ibm.com/support/knowledgecenter/SSB27U_6.3.0/com.ibm.zvm.v630.hcpa5/hcpa5313.htm z/VM 6.3.0 >Planning and Administration >z/VM: Getting Started with Linux on System z >Preparing for live guest relocation >Steps for performing a relocation for a Linux virtual server http://www-01.ibm.com/support/knowledgecenter/SSB27U_6.3.0/com.ibm.zvm.v630.hcpl0/hcpl086.htm > Queueing requests can be configured with: > "no_path_retry queue" (or its alias feature "queue_if_no_path"). > > https://www.suse.com/documentation/sles11/stor_admin/data/bbillhs.html > https://www.suse.com/documentation/sles11/stor_admin/data/bbj68de.html > https://www.suse.com/documentation/sles11/stor_admin/data/bbi89rh.html#b122sbgo > > https://www.suse.com/documentation/sles11/stor_admin/data/be5rvii.html#bok8cn1 > (actually I recommend to disable dev_loss_tmo entirely which might be > the SLES default anyway) > https://www.suse.com/documentation/sles11/stor_admin/data/mpioerrormgmt.html > > https://www.suse.com/documentation/sles11/stor_admin/data/mpiostall.html > > in case you use LVM: > http://www.novell.com/support/kb/doc.php?id=7007498 > -- Mit freundlichen Grüßen / Kind regards Steffen Maier Linux on System z Development IBM Deutschland Research & Development GmbH Vorsitzende des Aufsichtsrats: Martina Koederitz Geschaeftsfuehrung: Dirk Wittkopp Sitz der Gesellschaft: Boeblingen Registergericht: Amtsgericht Stuttgart, HRB 243294 ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/ WARNING: This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please delete it immediately. Please note that any views or opinions presented in this email are solely those of the author and do not necessarily represent those of EVERTEC, Inc. or its affiliates. Finally, the integrity and security of this message cannot be guaranteed on the Internet, and as such EVERTEC, Inc. and its affiliates accept no liability for any damage caused by any virus transmitted by this email.
