On 15 May 1997, Miquel van Smoorenburg wrote: > You can stripe swap without using md - the kernel does it for you > ever since Linux 1.3.2 :) > > Read the "swapon" manpage, option "-p".
The kernel may allocate pages on a round-robin basis, but I'd like to tuck my swapspace into my md disk for better io performance. I'm getting killed on a maxed-out IDE system. I've got four IDE drives, all Western Digital. Two 1.2Gs, as master on primary and secondary (spare, /, swap1, /usr on pri, /local, /var, swap2, /tmp on sec). Two 3.1Gs, as slave on primary and secondary (hdb1 and hdd1 comprise the entire disk and are md'd together in RAID0. I/O is quite good until my mirror runs, which dumps to the md array. Mirror tends to sit on a lot of memory (24MB for my debian mirror process alone), and swapping must compete with access to the md array (IDE drawbacks are becoming quite clear to me....). Anything else that should access any system partition in conjunction with the md array also suffers, but mirror is the biggest killer. As my system is currently laid out, I'm not suffering from any shortage of swap _space_ (240MB allocated, max seen in use is 33MB), I'm merely trying to sneak out the best possible performance without spending a buck. I think I'm just having trouble using a swapfile on a md array, as opposed to a pathname problem. Any ideas would, of course, be gladly accepted. Thanks, Pete -- Peter J. Templin, Jr. Client Services Analyst Computer & Communication Services tel: (717) 524-1590 Bucknell University [EMAIL PROTECTED] -- TO UNSUBSCRIBE FROM THIS MAILING LIST: e-mail the word "unsubscribe" to [EMAIL PROTECTED] . Trouble? e-mail to [EMAIL PROTECTED] .
