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Hello, we have an aix 6.1 LPAR that seems to be experiencing intermittient performance problems when it backs up it's Progress database to a jfs2 file system. This file system had 1 Volume group with three 8-way striped meta volumes from a symmetrix array (total of 24 symm devices all on...

Hello, we have an aix 6.1 LPAR that seems to be experiencing intermittient performance problems when it backs up it's Progress database to a jfs2 file system. This file system had 1 Volume group with three 8-way striped meta volumes from a symmetrix array (total of 24 symm devices all on...

Yes, I beleive so. Currently the HBAs on the VIO server are not being shared between multiple host LPARS. Only one AIX LPAR owns the HBA. The VIO server may have an FCS0 with 10: while on the LPAR that HBA may be FCS1 with a 10: and c0: HBA. Problem is we are not seeing the c0: WWN on the new...

Hello, I am a SAN engineer in a mixed environment with many different Operating Systems including AIX 6x. I've worked with several AIX engineers (that have since left the company) zoning Virtualized HBAs to different EMC arrays. A normal non-virtualized host will log into out CISCO MDS switches...

We have a statistical application called SAS running on AIX connected to a cx380. Many users log into the system to do analysis on data in our Oracle data warehouse. Data is sucked out of the Oracle tables and inserted into temporary SAS files in a file system called /saswork. The data in...

Hello, we have been having a problem with an AIX 5.3 server that is running SAS (statistical application). It shares an EMC cx380 array with several other servers/applications. The SAS system can do very heavy IO and tends to dominate the array and slowing performance for the other...

Hello, I have a p570 running aix 5.3. I have a VG called sasvg1 - 544GB. I have one LV (saslv1) and a file system called /sasfs1. The LV and file system are about 500GB but only 55GB are currently being used by the file system. I would like to shrink the file system to 100GB. This would give me...

I have a very write intensive file system that is 600 GB and does about 1,500 IOPS on an EMC cx380 array. I have created a Raid 1/0 Raid Group using 16 disks 8+8. I have created six 100 GB luns. The statistical application used on this server typically writes, sorts, merges and manipulates data...

I have a very write intensive file system that is 600 GB and does about 1,500 IOPS on an EMC cx380 array. I have created a Raid 1/0 Raid Group using 16 disks 8+8. I have created six 100 GB luns. The statistical application used on this server typically writes, sorts, merges and manipulates data...

I will be copying these file systems and their sub directories and files to the same 5.2 server but from one dmx array to a new dmx array. For the /ora_prd file system, I guess I'll have to use a slighlty different file system name like /ora_prd2 on the new array. When the file system copy is...

Also, the mirrorvgs are moving 1 - 1.5 GBs per minute. Do you think I'll get faster times with a file system copy, or tar etc?

Hello, we are using extendvg/mirrorvg to migrate VGs from one symmetrix array to another. One of the Big VGs is already at the 128 PV max so we can not extendvg. We will take an outage and manually copy all file systems in this VG to new file system names. Rather than just using the cp -R...

Well, one more thing just came up as I started to create my new RG with the 12 available 146GB drives. It looks like 4 of them might be vault drives - 000, 001 etc. Hmmm, I'd rather not use those drives for this busy RG. I do have 30 300GB drives available. Earlier I had prefered the 146GB...

One more question. In my current 3+1 Raid5 - for each write - parity is calculated and is also written to disk. Do parity bytes go on a different disk for each write of the data? I never really understood how that works.

Thanks all for great info. Xmsre, excellent lesson.

A little more info - Because this is a "work" file system it is a little strange. It looks like 55% writes and 45% reads. I'm guessing that an inital step writes stuff out to /saswork where it is sorted and manipulated for use later. Each job usually cleans up/deletes it's files at the end...

Hello, We are running a statistical application called SAS on AIX 5.3 connected to a cx380 with 8GB cache on each SP. There is a temporary/work file system called /saswork. Users kick off huge queries and much of the sorting etc is done in /saswork. Currently this file system sits on a 3+1 RAID...

Hello, our two old DNS servers are being replaced by two new DNS servers with different IP addresses. For our small hosts I have used smit to add the two new name servers and then used smit to remove the old ones. I went back and verified that the resolv.conf file had the correct entries. These...

I was surprised when I looked at the VG below. I need to add several new volumes but noticed that the MAX PVs is only 10. Since it is not 32, I'm guessing that someone made some type of change to the VG and this caused the MAX PVs to reduce to 10. Does this sound correct? Is there anyway I can...

Hello, We will be implementing HACMP later this year but at this point I have no experience with it. I am helping a friend with the migration of several AIX 5.3 boxes from an old Symmetrix array to a new one. I was looking at lsvg output that was sent to me from two of the boxes below...