Are their any good guides out there on how to use ksmctl to enable and
tune KSM performance on Centos/RedHat
At the moment the only guidelines I can find are from the following OLS
paper, plus the Linux Kernel Docs.
* http://www.kernel.org/doc/ols/2009/ols2009-pages-19-28.pdf
* http://www.ke
Let your backup array of hard drives falling down in the floor and try to
restore something later... :p
I haven't this problem with my LTO/DAT tapes. I don't like backups in hard
drives too.
2010/2/10 Benjamin Franz
> Christopher G. Stach II wrote:
> > - "compdoc" wrote:
> >
> >
> >> Combi
Christopher G. Stach II wrote:
> - "compdoc" wrote:
>
>
>> Combined with disk based network storage, tapes have a place
>> in IT.
>>
>
> Yes, archival storage.
>
Concur. You can buy 1TB RAID rated SATA drives (with a 7 year warranty)
for $150 US from Newegg.
The strategy I use is
- "compdoc" wrote:
> The tape is easily replaceable, without
> having to worry about bad connectors that can plague hot
> swap drive bay equipment.
I really worry about your staff if you have damaged hot swap anything. How many
insertions are they rated for? According to its data sheet, a
On Feb 10, 2010, at 11:43 AM, compdoc wrote:
> At $45 per tape for 320G of storage, it competes with hard
> drives. In case of tape drive failure, the tapes still work
> with the new drive. And with scsi or sata based tape drives,
> speed is not a problem.
...or, with 750GB drives today, you cou
>Christopher G. Stach II
>There is little argument for tapes at all in modern backup
systems unless you need archival storage and you have money
to burn on media, time (backup/restore time as well as time
lost during restore on the requesting side), staff, etc.
We think of our 320G Quantum Sata D
- "Ben Chobot" wrote:
> We used bacula to hotswap SATA disks. It worked great.
There is little argument for tapes at all in modern backup systems unless you
need archival storage and you have money to burn on media, time (backup/restore
time as well as time lost during restore on the reque
We used bacula to hotswap SATA disks. It worked great.
On Feb 10, 2010, at 8:39 AM, Lee Doran wrote:
> How does everyone feel about using Quantum LTO 3 and 4 tapes with
> Bacula for backing up both the VM’s, Host, as well as from within the VM’s.
>
> What are know good backup solut
How does everyone feel about using Quantum LTO 3 and 4 tapes
with Bacula for backing up both the VM's, Host, as well as from within
the VM's.
What are know good backup solutions? Can anyone name specific tape
drives / software that is working.
Lee
_
Got it!
As per: http://www.linux-kvm.org/page/Hotadd_pci_devices
You need to load the acpiphp kernel module:
[r...@localhost ~]# modprobe acpiphp
(I could not find pci_hotplug, but it worked without it)
If you then add a new disk from virsh:
virsh # attach-disk 9 /dev/mapper/vg_alma_fast-lv_te
> something along
>
> echo - - - > /sys/class/scsi_host/hostX/scan // yes, the "-"
> must be there !
Unfortunately there is nothing under scsi:
[r...@localhost ~]# ll /sys/class/scsi_*
/sys/class/scsi_device:
total 0
/sys/class/scsi_disk:
total 0
/sys/class/scsi_host:
total 0
I also
Mathieu Baudier wrote:
>> You also need to tell the guest that a new device exists... Unless it
>> (the guest) has some hotswap abilities
>>
>
> Do you know how I can do that?
>
something along
echo - - - > /sys/class/scsi_host/hostX/scan // yes, the "-"
must be there !
mi
> You also need to tell the guest that a new device exists... Unless it
> (the guest) has some hotswap abilities
Do you know how I can do that?
I reinstalled the guest (CentOS 5.4 x86_64, just as the host) with the
default non-desktop groups, but it still doesn't see when I attach a
disk.
I
Mathieu Baudier wrote:
>> yes, you can add / remove disks to a VM without restarting the guest.
>> look at the xm block-attach / block-detach commands
>>
>
> My understanding is that xm is Xen specific (I'm using Qemu/KVM)
>
> I tried with virsh:
>
> virsh # attach-disk 6 /dev/mapper/vg_alma_
> yes, you can add / remove disks to a VM without restarting the guest.
> look at the xm block-attach / block-detach commands
My understanding is that xm is Xen specific (I'm using Qemu/KVM)
I tried with virsh:
virsh # attach-disk 6 /dev/mapper/vg_alma_fast-lv_test_virtlvm2 vdb
Disk attached su
Mathieu Baudier wrote:
>>> 3. On both host and guest
>>>
>> This is what I always use and recommend. It doesn't have any side effects
>> with modern software versions, except with layered
>>
>
> Thanks!
>
> I have tried this, but I don't see how to grow the guest file system
> without
>> 3. On both host and guest
> This is what I always use and recommend. It doesn't have any side effects
> with modern software versions, except with layered
Thanks!
I have tried this, but I don't see how to grow the guest file system
without restarting the guest:
- if I grow the underlying logi
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