Ip problem! https://www.softaculous.com/board/index.php?tid=7692 <![CDATA[Ip problem!]]> https://www.softaculous.com/board/index.php?tid=7692&tpg=3#p26690
However a lowend card will be worse than software raid.]]> Wed, 17 Jun 2015 19:27:12 GMT https://www.softaculous.com/board/index.php?tid=7692&tpg=3#p26690 <![CDATA[Ip problem!]]> https://www.softaculous.com/board/index.php?tid=7692&tpg=2#p26582
Quote From : gauthig June 13, 2015, 3:31 pm
It was hinted out that the SSD while does cannot perform at 2.1 GBS you see.  Linux by default is using ram and sending a single to DD that it completed, although it is still in ram not on the disk.  It take a few more ms to complete the write. 
The proper way to test a disk with dd is to add "conv=fdatasync"That will informs the system to return the actual write speed after the memory is synced to disk.  Try this on the host and you should see 300-400MBs.
So why can't you get the same performance in a VPS, there is an issue with double caching, i.e. cache in the VPS then cache on the host.  The VPS tries to take care of this but not very good.  As always recommended cache=none is actually the best for the virto driver. This ensures that the VPS gets direct access to the array and always ensures when the system thinks something is written it actually is.


Yes, I set the caching to "none" at first. Do you have any idea about the hard or soft raid?
]]> Sat, 13 Jun 2015 15:41:50 GMT https://www.softaculous.com/board/index.php?tid=7692&tpg=2#p26582 <![CDATA[Ip problem!]]> https://www.softaculous.com/board/index.php?tid=7692&tpg=2#p26580 The proper way to test a disk with dd is to add "conv=fdatasync"That will informs the system to return the actual write speed after the memory is synced to disk.  Try this on the host and you should see 300-400MBs.
So why can't you get the same performance in a VPS, there is an issue with double caching, i.e. cache in the VPS then cache on the host.  The VPS tries to take care of this but not very good.  As always recommended cache=none is actually the best for the virto driver. This ensures that the VPS gets direct access to the array and always ensures when the system thinks something is written it actually is. ]]> Sat, 13 Jun 2015 15:31:07 GMT https://www.softaculous.com/board/index.php?tid=7692&tpg=2#p26580 <![CDATA[Ip problem!]]> https://www.softaculous.com/board/index.php?tid=7692&tpg=2#p26562
The values of 300+ are still plenty for any VM and services hosted on it, with a SSD you will get continuous performance even when loaded with VM's. Standard HD's will drop in performance due to latency of having to move to different areas of the disk platter for different VM's data.]]> Fri, 12 Jun 2015 17:46:23 GMT https://www.softaculous.com/board/index.php?tid=7692&tpg=2#p26562 <![CDATA[Ip problem!]]> https://www.softaculous.com/board/index.php?tid=7692&tpg=2#p26561

It reduced the io?!
]]> Fri, 12 Jun 2015 17:43:27 GMT https://www.softaculous.com/board/index.php?tid=7692&tpg=2#p26561 <![CDATA[Ip problem!]]> https://www.softaculous.com/board/index.php?tid=7692&tpg=2#p26560
tune2fs -m 0 /dev/md127


The line you will want to add to /etc/fstab is

/dev/md127 /vms                  ext4    defaults        1 2]]> Fri, 12 Jun 2015 17:08:50 GMT https://www.softaculous.com/board/index.php?tid=7692&tpg=2#p26560 <![CDATA[Ip problem!]]> https://www.softaculous.com/board/index.php?tid=7692&tpg=2#p26559 Board Image

And for the fstab, is this correct:

vms                /dev/md127 /vms      defaults        0 0

]]> Fri, 12 Jun 2015 17:04:33 GMT https://www.softaculous.com/board/index.php?tid=7692&tpg=2#p26559 <![CDATA[Ip problem!]]> https://www.softaculous.com/board/index.php?tid=7692&tpg=2#p26557
Do the following

mkdir /vz
mount /dev/md127 /vz

Then add /vz as a file based storage in Virtualizor, once your happy all is working your need to add the entry to the /etc/fstab file for it to mount on boot.]]> Fri, 12 Jun 2015 16:49:49 GMT https://www.softaculous.com/board/index.php?tid=7692&tpg=2#p26557 <![CDATA[Ip problem!]]> https://www.softaculous.com/board/index.php?tid=7692&tpg=2#p26556
Quote From : ZXHost June 12, 2015, 4:39 pm
So whatever your LVM name is replace xxxx with it

vgchange -a n xxxx

vgremove xxxx

mkfs.ext4 /dev/md127


So should I add "/dev/md127" to storage as "file" in QCOW2 format?
]]> Fri, 12 Jun 2015 16:47:50 GMT https://www.softaculous.com/board/index.php?tid=7692&tpg=2#p26556 <![CDATA[Ip problem!]]> https://www.softaculous.com/board/index.php?tid=7692&tpg=2#p26555
vgchange -a n xxxx

vgremove xxxx

mkfs.ext4 /dev/md127]]> Fri, 12 Jun 2015 16:39:30 GMT https://www.softaculous.com/board/index.php?tid=7692&tpg=2#p26555