Veeam Community Forums Digest for dandvo [Apr 23 - Apr 29, 2018]

Veeam Community Forums Digest

April 23 - April 29, 2018

 

THE WORD FROM GOSTEV

Not too many updates this week – just a couple of important points for VMware vSphere users which will hopefully save some of you some time. First, we're seeing the following issue with VMware Tools 10.2.0 making circles in our support because in particular it also affects our guest processing functionality. It is actually quite amusing for me to see from support cases how many virtual infrastructure issues our backup software uncovers due to being in the middle of everything. And often, it seems to be the only "infrastructure monitoring software" customers use anyway, probably thinking "while Veeam emails remain green, all is well". Anyway, sorry I got carried away - back to the actual issue, here's the official VMware support KB about it > Windows 7 and 2008 virtual machines lose network connectivity on VMware Tools 10.2.0. To resolve this issue, VMware suggests upgrading to VMware Tools 10.2.5, which is actually an interesting separate topic by itself. While it may look like a minor upgrade, it brings significant VMXNET3 driver changes around Windows RSS (Receive Side Scaling) and Receive Throttle options. If you follow this digest closely, you may remember that last year, I covered the issue which made VMware disable these features completely. The issue was only fully fixed in VMXNET3 driver version 1.7.3.7 (included in VMware Tools 10.2.0), with the corresponding settings however still disabled by default. VMware Tools 10.2.5 on the other hand comes with VMXNET3 driver version 1.7.3.8, which has these settings enabled by default – but only for new VMware Tools installations on new virtual machines. If you upgrade an existing VMware Tools install, these settings will remain as is (so in most cases, disabled). Problem! If you're not sure you have them enabled, the easiest way to check is go into your VMXNET3 Ethernet Adapter properties inside the VM, select the Advanced tab, and make sure Receive Side Scaling is Enabled, and Receive Throttle is set to 30 (these are the new defaults). Or, if you are the PowerShell-fu master, you can just use Get-NetAdapter cmdlet to query and set those values. In any case, reboot will be required. Why bother enabling them? RSS is actually quite important for enterprise apps which are network I/O intensive (including backup, by the way). This is because what RSS does is allow the network driver to spread incoming TCP traffic across multiple CPUs, resulting in increased multi-core efficiency and processor cache utilization. So if RSS is disabled, all incoming network traffic will be handled by only one CPU, meaning this CPU can become the bottleneck very quickly - especially if it is already quite busy with the actual application workload (again, think backup proxy VM as the perfect example).

 

BEST POST OF THE WEEK

Re: Feature request - Please don't   [BY: Alexander Fogelson • LIKED: 7 times] Hi Kari, sharing your case ID doesn't imply sharing any of your sensitive info, but allows us (Veeam employees) to look through the case details to get a better understanding of what's happening. Your initial post doesn't provide enough information about the issue to draw any sort of conclusion. Still, you're making a feature request and we need to get a better understanding of what you're requesting. Anyway, I was able to find and review the case and I'm actually not sharing your concerns regarding database backups. Unless you do a file-level backup, even with application-aware processing disabled Veeam Agent for Windows backs up the entire volume, including the database files located there. But it performs the COPY_ONLY backup that does not impact normal sequence of SQL Server backups in any way. What could have effect, is logs truncation, but it is not performed in case of COPY_ONLY backup.

 

TOP CONTENT

New build physical VBR server and O/S   [VIEWS: 138 • REPLIES: 6] Hi all, I'm just about to start a build of a new physical server for our VBR 9.5 and have a question about operating system. In the past we have been running Windows Server 2008 R2 and it has been rock solid. more Veeam Update 4 (.BCO file)   [VIEWS: 127 • REPLIES: 3] I noticed that the Veeam Backup config file states Veeam v9.5 Update 4 instead of 3. Because i don't know if it's a bug/typo or a difference between internal and external versioning, i figured to post it here and let 'someone from veeam' pick it up. more SQL Backups   [VIEWS: 125 • REPLIES: 4] hi guys ticket: 02815651 I have this case open but I want to be sure about something I have a Veeam Server in vlan 100 and IP 10.6.25.x and several customers all in different VLANs and ip segments, we have all these customer in our Vmware environment since we provide IaaS for customers right now we backup all their VMs without any issue but now customer want to backup SQL and Exchange Let's say I have this Veeam server VLAN100 10. more migrate from 2012 veeam server to 2016   [VIEWS: 115 • REPLIES: 1] Hi. We have a Windows Server 2012 with Veeam installed. We also have a JBOD attached with deduplication enabled. We now want to move (reinstall) with Server 2016. more Run script after VM Copy job?   [VIEWS: 114 • REPLIES: 5] Is it possible to set a script to run after a VM Copy job? I know how to do this for Backup jobs, but I'm not seeing the same option to do so for copies. I assume that means it's not possible, but figured I'd check here before giving up entirely. more

 

YOUR CONTENT

None of topics you have contributed to have been updated this week.