XenServer 7 has launched!
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It looks like /etc/centos-release isn't where that value is being pulled from. I edited the file and it didn't change the output of yum version.
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Well, I just went in and replaced every $releasever with 7 in the .repo files. I can now access yum. Now to figure out how to get my hands on drbd...
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@olivier said in XenServer 7 has launched!:
Using XO VM replication between 2 XS 7 hosts, initial copy of a 61GB VM in 8 minutes:
This is on a classic GB link.
Clearly, previous bottlenecks weren't in XO.
I have not seen anything like this on importing and exporting yet.
I am still getting super slow speeds.
Once I get all the VMs set up on the same machine, I will do some official testing.
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So you'll have to find the super slow bottleneck
My lab is pretty simple, if you need more info on how I achieved those speeds, tell me
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@olivier said
My lab is pretty simple, if you need more info on how I achieved those speeds, tell me
Well, in theory if I have two machines on a 1GB link, I should see speeds similar to yours, right?
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There is no magic: you need to have enough write speed on the target and read speed on the source.
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@olivier said
There is no magic: you need to have enough write speed on the target and read speed on the source.
Yeah, I'll set up some tests once I am done getting everything set back up.
Right now it's clipping along at 5MB/s so it's taking forever.....
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@olivier said in XenServer 7 has launched!:
There is no magic: you need to have enough write speed on the target and read speed on the source.
What is the sustained write speed on a SATA drive? I'm guessing it must be a lot lower than 120 MB/s??
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Depends of the drive, roughly between 40 and 60 MiB/s
edit: for a HDD
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@BRRABill said in XenServer 7 has launched!:
@olivier said
There is no magic: you need to have enough write speed on the target and read speed on the source.
Yeah, I'll set up some tests once I am done getting everything set back up.
Right now it's clipping along at 5MB/s so it's taking forever.....
Something is wrong with that picture. Even older SATA drives can hit 100MB/s. 100MB network connection could be topping out at that.
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For me, this is SSD going to SSD.
Granted, this current import is from my 100mbps desktop connection, but still, 40mbps is slow.
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I'm importing a 40GB VM, and it's already been almost 2 hours, which is about what 40GB takes to transfer at 5MB/s.
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@BRRABill said in XenServer 7 has launched!:
For me, this is SSD going to SSD.
Granted, this current import is from my 100mbps desktop connection, but still, 40mbps is slow.
That's within reason for a 100Mb network connection. The best I've seen out of a 100Mb network is 9MB/sec, that's on a network with zero other traffic.
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@BRRABill 1Gb networks are much nicer, and not any more expensive anymore. For future consideration.
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@travisdh1 said
That's within reason for a 100Mb network connection. The best I've seen out of a 100Mb network is 9MB/sec, that's on a network with zero other traffic.
Yeah, I am really just chatting at this point.
I'll set up two VMs on separate segments and test straight throughput and then the export/copy ... everything else.
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@travisdh1 said in XenServer 7 has launched!:
@BRRABill 1Gb networks are much nicer, and not any more expensive anymore. For future consideration.
Yeah, it's a long story.
The servers are all connected via 1GB, though.
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@BRRABill said in XenServer 7 has launched!:
@travisdh1 said in XenServer 7 has launched!:
@BRRABill 1Gb networks are much nicer, and not any more expensive anymore. For future consideration.
Yeah, it's a long story.
The servers are all connected via 1GB, though.
Assuming we both make it to Mangocon, maybe we can trade war stories
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@travisdh1 said
Assuming we both make it to Mangocon, maybe we can trade war stories
Sounds good!
I mean, 100Mbps is fine for 99% of what we do. It's just these VM transfers are a bear.
But, the new me with my fancy ML knowledge now just sets up a Linux instance and does the import/export on the 1GB segment. Viva la open source!
Of course THAT was also slow, which has me wondering... But as I said, nothing firm tested yet so we shall see.
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@Dashrender said in XenServer 7 has launched!:
@olivier said in XenServer 7 has launched!:
There is no magic: you need to have enough write speed on the target and read speed on the source.
What is the sustained write speed on a SATA drive? I'm guessing it must be a lot lower than 120 MB/s??
Way, way slower.
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@travisdh1 said in XenServer 7 has launched!:
@BRRABill said in XenServer 7 has launched!:
@olivier said
There is no magic: you need to have enough write speed on the target and read speed on the source.
Yeah, I'll set up some tests once I am done getting everything set back up.
Right now it's clipping along at 5MB/s so it's taking forever.....
Something is wrong with that picture. Even older SATA drives can hit 100MB/s. 100MB network connection could be topping out at that.
Can hit, but not sustain. Generally can't hit for very long at all.
