Text 14489, 92 rader
Skriven 2010-10-17 18:33:08 av James Bradley (1:342/77.0)
     Kommentar till en text av Benny Pedersen
Ärende: KVM & Slackware v3.4
============================
-=> Benny Pedersen wrote to James Bradley <=-

 BP> Hello James!
Heya Benny: <Waving>

 BP> 11 Oct 2010 14:11, James Bradley wrote to Benny Pedersen:

 BP>> 8 cores and 32GB ram :)
 JB> 4G.) and *only* two Xeons. (Humble I am! |-)

 JB> When setting up the swap space [...] as large as
 JB> your maximum allowable RAM to allot for future expansion.

 BP> i remember that to, but as the same time try to see how
 BP> much swap is used with 32GB ram, i bet this will be a hard
 BP> time for me, maybe if i start make kernel do disk cache on
 BP> read and writes to real disks it might speed up windows
 BP> disk speed not trashing so much io on my raid5 partion,

RAID 5... Now your making me jealous! <L>

My P!!! SMP used to HW RAID 5, (A botched firware update "fixed" that.)
but this new box only houses two SCSI drives, and as much as I've read on it -
even if I plug in an external enclosure - will only RAID to 1, or something
called 1E. <Don't ask me! B-> The plan now is to toss the P!!!, upgrade the
SCSI controller on the Xeons and tack on a SCSI enclosure. We'll see how kind
the auctioneer is going to be tonight. <L>

PS: He kept them for himself! Greedy bugger. <L>

 BP> windows can be a real killer here since if you disable swap
 BP> and give it 16GB ram it will still need 256K as swap file
 BP> to work, idiotic os :=)

Sacrilege, that you mentioned the OS *twice!* 

 JB> He also wrote that this rule starts to become overkill

 BP> overkill is when there is 4GB swap and newer used one single byte in it

 JB> using for a swap partition with 32G of RAM onboard [...]

 BP> i recommend spread swap out on as many harddisks as possible to spread
 BP> load for swap usage and keep swap space small as needed, so if
 BP> you have plenty of ram dont just make same amount of swap
 BP> if you dont have programs need it

Well... The plan is to have it serve and node some video. Because I'm far from
being Captain CL, I'll likely be running a GUI at times on it too, but time
will tell how much face-time it will get. Chances *are* slim, that it will
process much.

 BP> eg if you have 5 harddisks, make a swap partion on each,
 BP> and make 5 swap lines in fstab, got it ? :)

I never knew that could happen! I have RAIDed five together for a swap,
(Actually, on the P!!! that is being denigrated.) but never ran it much. I
suspect the RAID control would trump the multi-partition method? 

PS: Shouldn't a HW SATA RAID show up as /dev/sd[]? An Sil controller doesn't
seem to be sending (c)fdisk the message that it is there. 

 BP> btw linux supports swapfile just like windows does can be
 BP> handy in linux if one have small harddisks where swap is
 BP> fairly not needed.

Now, you mentioned it THRICE!!! "Lash Benny to the yardarm."

Could you explain what you mean by "Linux supports swapfile"? I've understood
it more of a memory dump when system RAM is needed by other things. Oh...
Because *everything* in *NIX is a file?

 JB> Sheesh... I remember when *32M* of RAM made you the envy of the
 JB> neighbourhood!

 BP> yep i could try add MEM=32M to my kernel line in grub.conf
 BP> if need to test swap :=)

Ya... grub isn't here for me to look it up, so if you say so. <G>

 JB> ... -rw-rw-rw- : File permission of the beast.

 BP> for worms in the internet to share files ?

[-|{ For those unwary, yes!


... Will that be cache or chkdsk?
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