If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
how about paging to SAN?
Hi, I'm considering to deploy my paging space in a SAN product, say,
HDS AMS1000. I know it's a safer decision to use rootvg but I think it worths a discussion. It's a olap application so the paging is major of big data blocks. Pls share your opinions and pls share the experience using a paging on SAN if you have... Thank you. |
#2
|
|||
|
|||
how about paging to SAN?
On 20 Mar, 13:11, " wrote:
Hi, I'm considering to deploy my paging space in a SAN product, say, HDS AMS1000. I know it's a safer decision to use rootvg but I think it worths a discussion. It's a olap application so the paging is major of big data blocks. Pls share your opinions and pls share the experience using a paging on SAN if you have... Thank you. We use SAN for our paging (but keep hd6 on rootvg of course which are non-san disks). I cant see why it would be safer to have it all on rootvg really? We dont have any problems with it being on the SAN. Of course you have to make sure you have good SAN performance, but then you'd want that anyway. Regards, Scott |
#3
|
|||
|
|||
how about paging to SAN?
On Mar 20, 9:11 am, " wrote:
Hi, I'm considering to deploy my paging space in a SAN product, say, HDS AMS1000. I know it's a safer decision to use rootvg but I think it worths a discussion. It's a olap application so the paging is major of big data blocks. Pls share your opinions and pls share the experience using a paging on SAN if you have... Thank you. Personally, I don't like paging, or booting from SAN, as it adds additional layers of complexity, and additional equipment that MUST be working error free, in order to have an operational system. (HBA's, link cables, switches, fabrics, trunking, array firmware.... etc) In this particular case, I would worry more about WHY I'm paging, than where to place the paging space on disk. If you're paging, application performance is going to suffer in either case. |
#4
|
|||
|
|||
how about paging to SAN?
On Mar 20, 10:19 pm, "scott" wrote:
On 20 Mar, 13:11, " wrote: Hi, I'm considering to deploy my paging space in a SAN product, say, HDS AMS1000. I know it's a safer decision to use rootvg but I think it worths a discussion. It's a olap application so the paging is major of big data blocks. oh, I mean it's safe for a decision maker for paging on rootvg is very common... I think what I want to do it what you have done. Pls share your opinions and pls share the experience using a paging on SAN if you have... Thank you. We use SAN for our paging (but keep hd6 on rootvg of course which are non-san disks). I cant see why it would be safer to have it all on rootvg really? We dont have any problems with it being on the SAN. Of course you have to make sure you have good SAN performance, but then you'd want that anyway. Regards, Scott |
#5
|
|||
|
|||
how about paging to SAN?
Thank you. I totally agree with you that we should do everything to
avoid paging. but in a customer environment, where their system is not tuned very well and there maybe ad-hoc queries on Tbs data... I'm considering for the worst conditions. Here, HDS AMS1000 is involved. Customer forwarded the note HDS provides: they said HDLM is not supporting paging space which I highly suspected and they suggest only a paging on rootvg solution. Personally, I don't like paging, or booting from SAN, as it adds additional layers of complexity, and additional equipment that MUST be working error free, in order to have an operational system. (HBA's, link cables, switches, fabrics, trunking, array firmware.... etc) In this particular case, I would worry more about WHY I'm paging, than where to place the paging space on disk. If you're paging, application performance is going to suffer in either case. |
#6
|
|||
|
|||
how about paging to SAN?
On Mar 20, 11:20 pm, wrote:
On Mar 20, 9:11 am, " wrote: Hi, I'm considering to deploy my paging space in a SAN product, say, HDS AMS1000. I know it's a safer decision to use rootvg but I think it worths a discussion. It's a olap application so the paging is major of big data blocks. Pls share your opinions and pls share the experience using a paging on SAN if you have... in a situation where not well tuned ad-hoc queries on Tbs data, or something similar you cannot control... I know either is a disaster when we trap into a large paging situation but I just want the one but the worst. Thank you. Personally, I don't like paging, or booting from SAN, as it adds additional layers of complexity, and additional equipment that MUST be working error free, in order to have an operational system. (HBA's, link cables, switches, fabrics, trunking, array firmware.... etc) In this particular case, I would worry more about WHY I'm paging, than where to place the paging space on disk. If you're paging, application performance is going to suffer in either case. |
#7
|
|||
|
|||
how about paging to SAN?
scott wrote:
We use SAN for our paging (but keep hd6 on rootvg of course which are non-san disks). I cant see why it would be safer to have it all on rootvg really? Well, simply because you are relying on an external path that may include a fiber HBA, cables, a switch and an external storage unit. More potential points of failure. I'm not violently disagreeing, since if your applications all reside on all external disk my whole argument would be pointless. Furthermore, if you do it right you will see a performance benefit over internal SCSI disk. Even so, I'm not convinced about the external route and see no reason why my internal SCSI disks can't do the job. I'd rather ensure that my system has enough memory (to avoid much paging), tune that and stick to a conservative approach that maximises uptime. cheers Niel |
#8
|
|||
|
|||
how about paging to SAN?
scott wrote:
We use SAN for our paging (but keep hd6 on rootvg of course which are non-san disks). Do you think that somehow this will protect you from an outage if one of your other paging spaces became unavailable? Niel |
#9
|
|||
|
|||
how about paging to SAN?
|
#10
|
|||
|
|||
how about paging to SAN?
On Mar 20, 12:21 pm, "Hardy" wrote:
On Mar 20, 11:20 pm, wrote: On Mar 20, 9:11 am, " wrote: Hi, I'm considering to deploy my paging space in a SAN product, say, HDS AMS1000. I know it's a safer decision to use rootvg but I think it worths a discussion. It's a olap application so the paging is major of big data blocks. Pls share your opinions and pls share the experience using a paging on SAN if you have... in a situation where not well tuned ad-hoc queries on Tbs data, or something similar you cannot control... I know either is a disaster when we trap into a large paging situation but I just want the one but the worst. Thank you. Personally, I don't like paging, or booting from SAN, as it adds additional layers of complexity, and additional equipment that MUST be working error free, in order to have an operational system. (HBA's, link cables, switches, fabrics, trunking, array firmware.... etc) In this particular case, I would worry more about WHY I'm paging, than where to place the paging space on disk. If you're paging, application performance is going to suffer in either case.- Hide quoted text - - Show quoted text - Hi, I am using SAN for paging on one of my larger AIX DB servers. I do have hd6 of course, but all my additional paging space is on SAN. I am running 10 Oracle apps databases off this particular server. I have been doing this for almost a year with no issues. The SAN is EMC symetrics, not power path. I will agree with a previous poster EMC power path software has caused me issues in the past, using EMC Clarion on AIX. |
|
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Paging Nutcracker | Jeffrey Alsip | Compaq Servers | 6 | December 18th 05 12:48 AM |
Paging Nutcracker | Jeffrey Alsip | Compaq Servers | 4 | December 12th 05 07:28 AM |
paging | sham | Storage (alternative) | 0 | April 24th 05 02:09 PM |
Paging Molly | Abso | UK Computer Vendors | 1 | October 24th 04 10:14 PM |
paging: M Francis | chris | Nvidia Videocards | 4 | February 8th 04 07:27 PM |