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Discussion Posts

Resolved! Calculate vxfs millisecond delay

We have a Netbackup master server cluster, the catalog/DB is sitting on a vxfs volume.  There is a case open currently with Veritas and they have found massive delays (40 seconds!) at backup peak time on the Sybase database and have recommended we d...

Chris_W by Level 4
Partner Accredited
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Resolved! SFHA 6.1: Poor performance with VxFS

Hallo @all I'm facing poor performance with VxFS ( EMC LUNs, host-based-mirrored volume with logplex :( We compress and uncompress a 10GB file and here are the results: pri620[root]/database/sybase_backup {NSH}: time compress test_a real    1m43....

Resolved! RUNQ values increased after upgrade to SFHA 6.1/RHEL5

Hi all, IHAC who has upgraded their SF HA 6.1 on RHEL 5 and noticed their RUNQ increased four times (0.1 avg to 0.4 avg). AFAIK, nothing has been changed during the upgrade. I'm wondering if it's an isolated case or expected behavior?    

Mouse by Moderator
Partner    VIP    Accredited Certified
  • 580 Views
  • 3 replies
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Resolved! Shrinking large filesystem spanned across multiple luns

Hello, we have a mirrored/raid1 volume of 1TB spanned across two arrays (80 luns from each array) and its usage is now 400G (at some point usage was 850G). We need to shrink the filesystem to 500G so that we can utilize the space for new filesystem. ...

KNR by Level 3
Certified
  • 385 Views
  • 1 replies
  • 1 kudos

Resolved! CVM/CFS on Solaris

Dear All, I would like to create a VCS cluster of 2 nodes that will have the CFS mounted on both of them. Once the CFS is mounted into the cluster I want to get it shared to the system that is not part of VCS cluster. My question is it possible if no...

Resolved! vxstat: time since last reset?

Hello,   I wonder if there is a way to determine the time since the last reset ('vxstat -r') of vxstat counters for some or all VxVM objects. Or asked differently: When vxstat gives me data like [root:/]# vxstat OPERATIONS ...

jf7640 by Level 3
Partner Accredited
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  • 1 replies
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Resolved! QDepth tuneup for DMP

Hi Am I right thinking setting the following in /etc/system which sets the QDepth and IO Timeout globally for the HBA's  set sd:sd_io_time=0x3c   set sd:sd_max_throttle=8   can be controlled at array level using vxdmpadm as per these tunable paramete...

Kumaran by Level 3
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  • 4 replies
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Watching Oracle Disk Manager work with Solaris dtrace

Hi, I had to get ODM to work in a Solaris 10 container (aka zone) and wanted to make sure that Oracle did indeed use ODM and direct I/O to the Oracle files. I could not find documentation for the Veritas dtrace probes but after some trying and guessi...

jf7640 by Level 3
Partner Accredited
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RAID5 Full Stripe Write

I created a fresh VxVM 6.0 RAID5 volume on four columns. I performed some basic I/O operations and noticed that writes always end in read-modify-write cycle. I haven't been able to trigger a full stripe writes yet, regardless of the command I used...

damjan by Level 3
  • 1336 Views
  • 7 replies
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Resolved! mirroring plexes across arrays

Are there any cons to mirroring plexes for a single volume across two different arrays for redundancy? I'm familar with the process of mirroring plexes and use it often to migrate a volume from one lun to another lun but was unsure what was the longt...

Limit I/O on VxVM volumes

Hi everybody, I was looking for a solution to set limits for I/O usage on VxVM volumes, but couldn't find anything that fits my requirements. Maybe one of you can help me. I'm running a HA-Cluster on RHEL 5 with iSCSI storage managed by VxVM. The iSC...

Resolved! Using "Unbuffered" (Direct I/O) with RAC + SFRAC

Veritas Storage Foundation for Oracle RAC 5.1 Oracle RAC 10.2.0.5 Currently, MountOpt="mincache=direct" is not set in main.cf. My questions here are: - Would it make a difference in write performance if the above option was set (for file systems ...

kkhayer by Level 2
  • 461 Views
  • 3 replies
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Resolved! vxdbd high cpu usage @ hpux

  There is evidence vxdbd daemon is consuming too much cpu and following its behaviour has many EPIPE errors on writes. See first column: $ grep " write" ./pid.12331  | awk '{print $4,$5, $7, $9, $16,$17}' | sort | uniq -c | sort -rn 45355 pid=12331 ...

alizarra by Not applicable
  • 1210 Views
  • 1 replies
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