Replies posted by penguindows
[user=84063]Bradley4681[/user] When you run: [code]nutanix@NTNX:~$ python /home/nutanix/serviceability/bin/edit-aos-gflags --service=stargate [/code] You enter in to a text editor with all the stargate service glfags. Here, you can edit the settings to achieve different results. The settings i adjusted that wound up working for me basically amounted to an increase in the number of streams per vdisk, the amount of data saturation allowed on the line, and the priority that stargate gave to replication processing. This allowed me to overcome the high latancy on my cross US pipe. You can find my specific setting adjustments in the block that you quoted. Also, you'll probably need to get a genesis restart at a minimum. Its worth noting a few things about my environment that made this combination of settings work without any negative impacts: [list=1] [*][b]Homogeneous images:[/b] every guest in the entire cluster is doing the same type of work, is the same size and has th
Yes, I see dlink7,s reply. Thanks [user=33]dlink7[/user] for the good info on expected performance under ideal situations. That does give me a good baseline. Our issue is definitely latency. Our remote site is across the continental US, and our per VM size is 30TB (10TB used) on a single disk. as you can imagine, this creates a bottleneck for us. Replications with default settings are not meeting RPO. Our AOS version is 5.5.2. I have found (with help from support) these tunable settings within the cluster: [code]nutanix@NTNX:~$ python /home/nutanix/serviceability/bin/edit-aos-gflags | grep stargate_ 2018-06-08 10:00:09 INFO zookeeper_session.py:110 edit-aos-gflags is attempting to connect to Zookeeper stargate_cerebro_replication_max_rpc_vblocks = 16 #default 4 stargate_cerebro_replication_max_rpc_data = 4194304 #default 1048576 stargate_cerebro_max_outstanding_vdisk_replication_rpcs = 16 #default 4 stargate_cerebro_replication_param_multiplier = 32
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