And then after you have all the underlying AIX work done, you should create the copy storage pool device class using some reasonable size maxcap value. I've had reasonable success with 5000M as a starter. Then instead of using scratch volumes (set maxscratch on the pool to zero), use define vol stgpool /ld1/of formatsize=5000 numberofvol=256 to create the volumes. This will create 256 files named /ld1/of0000, of0001, etc. Repeat until you fill up the logical drive. By creating the volumes like this you avoid fragmentation on your drives. If you need more detail about the commands to set this up, let me know.
The key to successful use of file device class on devices of this sort is large write back caches. I assume you will RAID5 the drives in the DS4800. Since RAID5 is not particularly good for write, the cache is very important. We have had good luck with large disk pools using the file device class. Our shelves, though, have 1GB of cache. Kelly J. Lipp VP Manufacturing & CTO STORServer, Inc. 485-B Elkton Drive Colorado Springs, CO 80907 719-266-8777 [EMAIL PROTECTED] -----Original Message----- From: ADSM: Dist Stor Manager [mailto:[EMAIL PROTECTED] On Behalf Of Andrew Carlson Sent: Monday, December 04, 2006 10:24 AM To: ADSM-L@VM.MARIST.EDU Subject: Re: [ADSM-L] copypools on disk on AIX? We tried file device class with our onsite pool with disappointing results. I believe the problem was our decision not to stripe across LUN's. This would have made performance much better, at the cost of a LUN failure causing more damage than if we used them indicidually. Now, I can't remember the last time I saw a LUN failure, but YMMV. We will probably address this issue again when the decision is made to move our copy pool to disk. On 12/1/06, Lawrence Clark <[EMAIL PROTECTED]> wrote: > > We are migrateing our copypool from cartridge to a DS4800. > > From the manuals copypools only support FILE type devices. > > My assumptions ( on AIX) are: > > -I create logical volumes and file systems -Define the device class > -TSM then creates the files in the filesystem > > Anyone ever done this with copypools on AIX? > > >>> [EMAIL PROTECTED] 12/01/06 9:56 AM >>> > Know of anyone using a vaulting service with transmissions over the > Internet with TSM? We're at capacity and looking for options. > > Regards, > Orin > > Orin Rehorst > > > The information contained in this electronic message and any > attachments to this message are intended for the exclusive use of the > addressee(s) and may contain information that is confidential, > privileged, and/or otherwise exempt from disclosure under applicable > law. If this electronic message is from an attorney or someone in the > Legal Department, it may also contain confidential attorney-client > communications which may be privileged and protected from disclosure. > If you are not the intended recipient, be advised that you have > received this message in error and that any use, dissemination, > forwarding, printing, or copying is strictly prohibited. Please > notify the New York State Thruway Authority immediately by either > responding to this e-mail or calling (518) 436-2700, and destroy all copies of this message and any attachments. > -- Andy Carlson ------------------------------------------------------------------------ --- Gamecube:$150,PSO:$50,Broadband Adapter: $35, Hunters License: $8.95/month, The feeling of seeing the red box with the item you want in it:Priceless.
