Anonymous_User Absent Member.
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NW 6.5 SP8 / VmWare ESXi 5.1 U1 / Slow disk performance / Vmware datastore resides on RAID 5 SSDs

Hello.

We have a Netware 6.5 SP8 server with 8 GB RAM running under VmWare ESXi 5.1
U1. The ESXi Host was now upgraded to SSD disk. The disk performance inside
the Netware 6.5 is bad while the perfomance inside a W7 machine is really
fast.

VMwareguest Netware 6.5 SP8 disk performance (read or write) is about 18MB/s
(tested with CC Commander, local copy between two nss netware volumes)
VMwareguest Windows 7 disk performance (read or write) is above 230 MB/s

What can I do to boost up the Netware 6.5. disk performance ?

Netware 6.5 was migrated from physical to virtual using Portlock
storagemanager.

The used disk driver is: LSIMPTNW.HAM 5.02 5 Dec 2007

VMware tools are running. No antivirus tool runs on Netware 6.5. SP8

Here are the NSS parameters:
Enable checking of the execute bit OFF Detailed information
NSS Out Of Disk Space Alerts ON Detailed information
Mount ISO 9660 multi disc set as one CDDVD volume OFF Detailed information
NSS Loads UDF-bridge CD as ISO9660 volume OFF Detailed information
NSS Auto Locks CD-DVD Disc in device OFF Detailed information
NSS Leaves CD-DVD Volume Objects in NDS OFF Detailed information
NSS Auto Update CD-DVD Volume Objects To NDS OFF Detailed information
Emulate Classic NetWare Directory Quotas OFF Detailed information
Number of buffers reserved per Encrypted Volume 50 Detailed information
NSS Work To Do Count ** 50 Detailed information
NSS Maximum Cache Balance Buffers Per Session 1024 Detailed information
NSS Cache Balance Timer 30 Detailed information
NSS Cache Balance Percent 85 Detailed information
NSS Cache Balance Enable ON Detailed information
NSS Buffer Flush Timer 1 Detailed information
NSS Minimum OS Cache Buffers 256 Detailed information
NSS Minimum Cache Buffers 512 Detailed information
NSS File Flush Timer 10 Detailed information
NSS Closed File Cache Size 100000 Detailed information
NSS Auth Cache Size ** 1024 Detailed information
NSS ASCII Name Cache Enable ** ON Detailed information
NSS Name Cache Enable ** ON Detailed information
NSS Name Cache Size 100000 Detailed information
NSS Low Volume Space Alerts ON Detailed information
NSS Low Volume Space Warning Reset Threshold 15 Detailed information
NSS Low Volume Space Warning Threshold 10 Detailed information
NSS Above 4 Gig Memory Percent ** 80 Detailed information

Any suggestions for troubleshooting?

Thanks,
Michael


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Knowledge Partner
Knowledge Partner

Re: NW 6.5 SP8 / VmWare ESXi 5.1 U1 / Slow disk performance / Vmware datastore resides on RAID 5 SSDs

I don't believe that 8 GB is doing you any good. Netware uses at most
4 GB.

I haven't run Netware on VMware, although I may move my last one there
soon, so I kept some notes I had seen somewhere on this forum. Someone
was having performance issues and was told to set a memory reservation
on the VM equal to the memory assigned to the VM. That fixed their
performance issues.

So try changing the assigned memory to 4 GB and set a reservation for
it and see if that helps.

Regards,
Ken
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Knowledge Partner

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ataubman Absent Member.
Absent Member.

Re: NW 6.5 SP8 / VmWare ESXi 5.1 U1 / Slow disk performance

Actually, that's not so. While iNW can't directly address memory over the 4gb line, it can use it for NSS caching and User memory (eg Java).

Andrew C Taubman (Sorry, support is not provided via e-mail) Opinions expressed above are not necessarily those of Micro Focus.
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ataubman Absent Member.
Absent Member.

Re: NW 6.5 SP8 / VmWare ESXi 5.1 U1 / Slow disk performance

I'm not familiar with CC Commander, does that run on the server or a workstation? If the latter then of course the issue could be networking, not disk speed.

Andrew C Taubman (Sorry, support is not provided via e-mail) Opinions expressed above are not necessarily those of Micro Focus.
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peterkuo Absent Member.
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Re: NW 6.5 SP8 / VmWare ESXi 5.1 U1 / Slow disk performance

I am not sure if there is much you can do about it since NetWare doesn't know how to take advantage of SSD "correctly." Even for Windows, XP for example doesn't know how to take full advantage of SSDs either and it is really until Windows 7 (as I don't think Vista did either) came along. You can TRY tuning the block sizes etc. but I doubt there is very much to be done.

-- eDirectory Rules! Peter www.DreamLAN.com
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Bob-O-Rama
Visitor.

Re: NW 6.5 SP8 / VmWare ESXi 5.1 U1 / Slow disk performance

My favorite want to exercise the I/O channel, and give you some hard target to know if you are changing things for the better is 10092890: Readme for the TSATEST.NLM backup diagnostic tool. TSATEST. This will test raw disk performance irrespective of the network I/O.

IF general disk I/O is fast, then its an issue isolated to the network drivers. Ensure you are using the "best" ( which is to say the one that works best ) network card. There are differences in performance.

REDUCE the RAM to 4GB but set the memory reservation to 100% of that RAM.

Unload IDECD if loaded.

On the guest, reduce the number of CPUs to 1, disable hyperthreading.

-- Bob
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Knowledge Partner
Knowledge Partner

Re: NW 6.5 SP8 / VmWare ESXi 5.1 U1 / Slow disk performance

Michael;2279357 wrote:
VMwareguest Netware 6.5 SP8 disk performance (read or write) is about 18MB/s
(tested with CC Commander, local copy between two nss netware volumes)
VMwareguest Windows 7 disk performance (read or write) is above 230 MB/s


Hi Michael,

A shot in the dark, but have you tried adjusting the NSS volume readahead? I'd suggest to first try the value 0... then do the CC copy test again. Also test using values 256,512,1024. (can be done in NSSMU at the volume properties).

Also try turning off/on hardware disk acceleration (can be set in the NetWare settings - can't remember the exact naming of the parameter).

It sometimes also helps to edit the VM settings for the NetWare VM and set the same amount of memory reservation as also limit as as assigned to the VM (in the Resources > Memory tab option of the VM's settings).


Other than that... not much I can think of.

-Willem
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multicom Absent Member.
Absent Member.

Re: NW 6.5 SP8 / VmWare ESXi 5.1 U1 / Slow disk performance

ataubman;2279691 wrote:
I'm not familiar with CC Commander, does that run on the server or a workstation? If the latter then of course the issue could be networking, not disk speed.


Hi.

It runs on the server. I copied a 2.8 GB file locally on the server. So disk speed without LAN is measured.

Michael
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multicom Absent Member.
Absent Member.

Re: NW 6.5 SP8 / VmWare ESXi 5.1 U1 / Slow disk performance

Bob-O-Rama;2279708 wrote:
My favorite want to exercise the I/O channel, and give you some hard target to know if you are changing things for the better is 10092890: Readme for the TSATEST.NLM backup diagnostic tool. TSATEST. This will test raw disk performance irrespective of the network I/O.

IF general disk I/O is fast, then its an issue isolated to the network drivers. Ensure you are using the "best" ( which is to say the one that works best ) network card. There are differences in performance.

REDUCE the RAM to 4GB but set the memory reservation to 100% of that RAM.

Unload IDECD if loaded.

On the guest, reduce the number of CPUs to 1, disable hyperthreading.

-- Bob

Hi.

Thank you for the comments.

I will try TSATEST.
Why to reduce the RAM to 4GB? The system uses the above 4GB for NSS caching so I assume this speeds things up.
I will set the reservation to 100% of RAM and unload idecd which is loaded.
The system has already only one CPU, but I also try to disable Hyperthreading.

Michael
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multicom Absent Member.
Absent Member.

Re: NW 6.5 SP8 / VmWare ESXi 5.1 U1 / Slow disk performance

magic31;2279722 wrote:
Hi Michael,

A shot in the dark, but have you tried adjusting the NSS volume readahead? I'd suggest to first try the value 0... then do the CC copy test again. Also test using values 256,512,1024. (can be done in NSSMU at the volume properties).

Also try turning off/on hardware disk acceleration (can be set in the NetWare settings - can't remember the exact naming of the parameter).

It sometimes also helps to edit the VM settings for the NetWare VM and set the same amount of memory reservation as also limit as as assigned to the VM (in the Resources > Memory tab option of the VM's settings).


Other than that... not much I can think of.

-Willem

Hi.

I try with the NSS volume readahead.
I don't know which hardware disk acceleration you mean. Any idea where to look at? I tried setting up the "Sequential Elevator depth = 1000", "Enable Hardware write back=on" and "Enable disk read after write verify=off", in Console Monitor / disk parameters for testing.

>> It sometimes also helps to edit the VM settings for the NetWare VM and set the same amount of memory reservation as also limit as as assigned to the VM (in the Resources > Memory tab option of the VM's settings).
I just can set in vSphere on the Netware VM on tab "Resources" "Reserve all guest memory (All locked)". When this is ticked nothing else can be changed. Did you mention anything else to set here?

Thanks,
Michael
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Knowledge Partner
Knowledge Partner

Re: NW 6.5 SP8 / VmWare ESXi 5.1 U1 / Slow disk performance / Vmwaredatastore resides on RAID 5 SSDs

Hi.

On 26.08.2013 12:29, Michael wrote:
> Hello.
>
> We have a Netware 6.5 SP8 server with 8 GB RAM running under VmWare ESXi 5.1
> U1. The ESXi Host was now upgraded to SSD disk. The disk performance inside
> the Netware 6.5 is bad while the perfomance inside a W7 machine is really
> fast.
>
> VMwareguest Netware 6.5 SP8 disk performance (read or write) is about 18MB/s
> (tested with CC Commander,


You're testing CC Commander, not Netware. 😉

Try a local tsatest.

CU,
--
Massimo Rosen
Novell Knowledge Partner
No emails please!
http://www.cfc-it.de
CU,
--
Massimo Rosen
Micro Focus Knowledge Partner
No emails please!
http://www.cfc-it.de
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Bob-O-Rama
Visitor.

Re: NW 6.5 SP8 / VmWare ESXi 5.1 U1 / Slow disk performance

multicom;2279727I will try TSATEST.

VMWARE implements a virtual memory system, any of what is thinks are unused bits of memory like stale cache, it reclaims to make the rest of the crazy train amble down the tracks. Are you oversubscribed for memory on the host? Also caching isn't magic, it works under certain conditions. If you are copying more than 4GB of data, or never touching the same data twice, it will not reduce your physical I/O load.
multicom;2279727 wrote:

I will set the reservation to 100% of RAM and unload idecd which is loaded.
The system has already only one CPU, but I also try to disable Hyperthreading.
Michael
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multicom Absent Member.
Absent Member.

Re: NW 6.5 SP8 / VmWare ESXi 5.1 U1 / Slow disk performance

mrosen;2280285 wrote:
Hi.

On 26.08.2013 12:29, Michael wrote:
> Hello.
>
> We have a Netware 6.5 SP8 server with 8 GB RAM running under VmWare ESXi 5.1
> U1. The ESXi Host was now upgraded to SSD disk. The disk performance inside
> the Netware 6.5 is bad while the perfomance inside a W7 machine is really
> fast.
>
> VMwareguest Netware 6.5 SP8 disk performance (read or write) is about 18MB/s
> (tested with CC Commander,


You're testing CC Commander, not Netware. 😉

Try a local tsatest.

CU,
--
Massimo Rosen
Novell Knowledge Partner
No emails please!
Untitled Document


Hello.

What I have done to improve the speed:

- Memory reservation in vSphere
- No Hyperthreading
- vmwaretools loaded directly after mount all
- disk driver lsimptw updated
- nss volume readahead set for both volumes to 256 (I think this one has improved the speed)
- set some netware settings
- ;network
- Set TCP IP maximum small ECBS = 65534
- Set maximum pending TCP connection requests = 4096
- Set maximum packet receive buffers = 10000
- Set minimum packet receive buffers = 4000
- Set new packet receive buffer wait time = 0.1

- ;storage
- Set enable disk read after write verify = off
- set sequential elevator depth = 6000
- set enable hardware write back = on
- set maximum concurrent disk cache writes = 4000
- set maximum transactions = 10000
- set maximum concurrent directory cache writes = 300
- Set maximum concurrent directory cache writes = 500

Now I can copy with CC commander with about 60mb/s. This is a local copy without using the network.
A file copy via the network is now at about 20-30mb/s with the Novell Client while a FTP copy from the Novell server is about 30-40mb/s.

TSATEST gave me before the changes:
about 9600 MB/min with max error 38%

TSATEST after the changes:
about 10320 MB/min with max error 42%

So the changes made things faster, but I still hope theres something more to improve.

Michael
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Knowledge Partner
Knowledge Partner

Re: NW 6.5 SP8 / VmWare ESXi 5.1 U1 / Slow disk performance

multicom;2279729 wrote:
.. "Enable Hardware write back=on"


Yeah, that's the one I was thinking of when I mentioned disk acceleration. Turning it off might improve throughput slightly this situation.

From your last post with the (great!) sum-up of changes you've made, I think you are quite close to the optimum for NetWare on VMware (as neither VMware nor Novell have really done anything to optimize this combo).

Which virtual network adapter type are you using btw? I'm assuming the E1000?

Cheers,
Willem
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multicom Absent Member.
Absent Member.

Re: NW 6.5 SP8 / VmWare ESXi 5.1 U1 / Slow disk performance

magic31;2280346 wrote:
Which virtual network adapter type are you using btw? I'm assuming the E1000?


Yes, I am using CE1000.LAN 7.63 12 November 2004
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