Month: June 2017

DPM 2016 Database Bug

jantorep

Hello All

Update this is a Windows Defender issue not a database issue. http://jtpedersennew.azurewebsites.net/index.php/2017/07/06/windows-defender-issue-on-windows-server-2016-with-dpm/

This will be short, There seams to be a bug in the DPM 2016 database once it reaches a certain size or number of recovery points. We have 2 setup around the same time and both failed within 2 days of each other. The symptoms where backups just standing still not doing anything and if i open resource monitor of perfmonitor it would be slow and sluggish.

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RoCE/RDMA/DCB what is it and how to configure it

jantorep

Updated January 29th with new Priority Flow Control recomendations to add Cluster HeartBeat to Priority ID 7 for Windows Server and Dell Switches.

Updated May 26th 2018 with HPE FlexFabric config

You have probably heard these acronyms somewhere, so what are these and are they the same. In short yes and no

RoCE stands for RDMA over Converged Ethernet, the RDMA part is Remote Direct Memory Access.

RDMA allows for network data(TCP packets) to be offloaded on the Network cards and put directly in to the memory, bypassing the hosts CPU. Allowing for the host to have all the access to the CPU. In normal TCP offload all the network traffic goes trough the CPU and with higher speeds will take more CPU. On a 10gbit network it would take about 100% cpu on a 12 core Intel Xeon V4 CPU. Read more →