On 19 April 2011 23:01, Roberto Spadim <roberto@xxxxxxxxxxxxx> wrote: > hum, some doubts.... > whatÂs better (faster / secure)? > swap over one disk (no raid) > swap over one md raid1 > swap over one md raid0 > swap over one md raid10 > swap over one md raid5 > swap over one md raid6 > > > > 2011/4/19 Steven Haigh <netwiz@xxxxxxxxx>: >> On 20/04/2011 7:10 AM, Gordon Henderson wrote: >>> >>> I'm actually of the opinion that to NOT put swap on RAID in an otherwise >>> RAIDed system is just plain silly. Do it. You know it makes sense! >> >> I think the preferred method at the moment (and at least for 2010/2011) is >> to have a smallish RAID1 partition for /boot then create a second RAID array >> for everything else and use LVM on top of that. >> >> That allows you to have the host on the same RAID1 and use the flexibility >> to use LVM for all your other requirements. >> >> I personally run a Xen virtualisation server - it has the following: >> /dev/md0 - /boot - 512Mb - RAID1 >> /dev/md1 - VG 'RAID1' - rest of disk - RAID1 >> /dev/md2 - VG 'RAID5' - 3 x 1Tb whole disks - RAID5 >> >> Then the majority of the 7 VMs on that machine live on the RAID5 VG (with >> one special case that is on the RAID1 VG) and it runs very happily. >> >> The swap and root of Dom0 is on the RAID1 VG. This seems to be the best way >> I've found to have the most flexibility and not have to change things as >> time progresses. >> >> -- >> Steven Haigh >> >> Email: netwiz@xxxxxxxxx >> Web: http://www.crc.id.au >> Phone: (03) 9001 6090 - 0412 935 897 >> Fax: (03) 8338 0299 >> >> There are no great men, only great challenges that ordinary men are forced >> by circumstances to meet. -- Admiral William Halsey >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-raid" in >> the body of a message to majordomo@xxxxxxxxxxxxxxx >> More majordomo info at Âhttp://vger.kernel.org/majordomo-info.html >> > > > > -- > Roberto Spadim > Spadim Technology / SPAEmpresarial > -- > To unsubscribe from this list: send the line "unsubscribe linux-raid" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at Âhttp://vger.kernel.org/majordomo-info.html > You can't say "faster/secure", it's mostly either one. Swap over raid0 or some raid10 implementation would probably be the fastest. Swap on raid456 would be incredibly slow write wise... // M -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
