[PVE-User] about IO Delay using openvz and zimbra

[Orlando Martinez Bao]

Hello, Havana is great.

My cluster configuration is as follow.

I have 7 node all use local storage the Servers descriptions is as follow:
1. Dell PowerEdge 1xCPU  8GRAM 3HDD 10K 600GB not in RAID.
2. Dell PowerEdge T320 1xCPU, 12GRAM, 2HDD 1Tera RAID-1 disk Hardware.
(Server where I have a container with Zimbra)
3. Inspur 2xCPU (24 core), 64GRAM, 5HDD 1 Tera RAID-5 Hardware.
All other server are PC I5 8GRAM and 1 HDD 1TB.

I have 2 PC with 4xHDD 1TB, 1 with FreeNAS and 1 with Openfiler Both I use
with NFS to backup and storage data.

Al VM in the cluster use local storage, Why? Because never could create a VM
using NFS shared storage. I did two week ago so only 1 VM is shared storage.

I want to create a new cluster with Proxmox 4.2 using Ceph for storage, but
for now I need to solve this problem.

Thanks 
Best regards
Orlando



-----Mensaje original-----
De: pve-user [mailto:pve-user-bounces at pve.proxmox.com] En nombre de Fabrizio
Cuseo
Enviado el: viernes, 17 de junio de 2016 4:36
Para: pve-user
Asunto: Re: [PVE-User] about IO Delay using openvz and zimbra

Hello.
First, please say "hello" to Havana... i miss Cuba (my only time in cuba, 2
years ago, habana, trinidad, vinales).

Regarding your problem: can you describe better your cluster configuration ?
Which kind of storage (both local and shared) are you using ? RAID-1 disks
are software or hardware raid ? Do you have a controller with cache memory
and backup battery ? 

Why have you choosen to have only a container with local storage (and not a
VM with shared storage) for zimbra installation ? 
If you have a very busy zimbra server, you will have a lot of disk I/O
activity, and hardware requirements are growing for last zimbra releases
(8.6). You can try to monitor your container activity with both "sar" and
"dstat".

Regards, Fabrizio 


----- Il 17-giu-16, alle 4:38, Orlando Martinez Bao ombao at unah.edu.cu ha
scritto:

> Hello friends
> 
> I am SysAdmin at the Agrarian University of Havana, Cuba.
> 
> 
> 
> I have installed Proxmox v3.4 here a cluster of seven nodes and for 
> some days I am having problems with a node in the cluster which only 
> has a Container with Zimbra 8.
> 
> The problem is I'm having a lot of I / O Delay and that server is very 
> slow to the point that sometimes the service is down.
> 
> The server is PowerEdge T320 Dell with Intel Xeon E5-2420 12gram with 
> 12 cores and 1GB of disk 7200RPM 2xHDD are configured as RAID1.
> 
> I have virtualizing the zimbra 8 using a template of 12.04, has 8 
> cores, 8G RAM, 500GHD the storage of container is local storage.
> 
> Then I put the output to see the IO when you are not running the VM. 
> Look at the BUFFERED READS that are marked are very bad. And those 
> moments have seen IO Delay up to 50%.
> 
> 
> 
> root at n07:~# pveperf
> 
> CPU BOGOMIPS:      45601.20
> 
> REGEX/SECOND:      1025079
> 
> HD SIZE:           9.84 GB (/dev/mapper/pve-root)
> 
> BUFFERED READS:    1.51 MB/sec
> 
> AVERAGE SEEK TIME: 165.88 ms
> 
> FSYNCS/SECOND:     0.40
> 
> DNS EXT:           206.20 ms
> 
> DNS INT:           0.91 ms (unah.edu.cu)
> 
> root at n07:~# pveperf
> 
> CPU BOGOMIPS:      45601.20
> 
> REGEX/SECOND:      1048361
> 
> HD SIZE:           9.84 GB (/dev/mapper/pve-root)
> 
> BUFFERED READS:    0.78 MB/sec
> 
> AVERAGE SEEK TIME: 283.84 ms
> 
> FSYNCS/SECOND:     0.50
> 
> DNS EXT:           206.13 ms
> 
> DNS INT:           0.89 ms (unah.edu.cu)
> 
> root at n07:~# pveperf (Este fue cuando detuve la VM)
> 
> CPU BOGOMIPS:      45601.20
> 
> REGEX/SECOND:      1073712
> 
> HD SIZE:           9.84 GB (/dev/mapper/pve-root)
> 
> BUFFERED READS:    113.04 MB/sec
> 
> AVERAGE SEEK TIME: 13.49 ms
> 
> FSYNCS/SECOND:     9.66
> 
> DNS EXT:           198.59 ms
> 
> DNS INT:           0.86 ms (unah.edu.cu)
> 
> root at n07:~# pveperf
> 
> CPU BOGOMIPS:      45601.20
> 
> REGEX/SECOND:      1024213
> 
> HD SIZE:           9.84 GB (/dev/mapper/pve-root)
> 
> BUFFERED READS:    164.30 MB/sec
> 
> AVERAGE SEEK TIME: 13.61 ms
> 
> FSYNCS/SECOND:     16.34
> 
> DNS EXT:           234.75 ms
> 
> DNS INT:           0.94 ms (unah.edu.cu)
> 
> 
> 
> 
> 
> Please help me.
> 
> Best Regards
> 
> Orlando
> 
> 
> 
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