Outage 10th April

 
  michaelgreenhill Administrator That's Numberwang!

Location: Melbourne
Hi guys,

Apologies for our disappearance yesterday. Our production VMWare server ran out of disk space Embarassed due to our vmdk snapshots taking up more space than budgeted for.  

We're back!

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  freightgate Minister for Railways

Location: Albury, New South Wales
Thanks for the update. Well done to all those involved in getting you back up and running.

Sounds as thou you bus are pushing hard limits. Upgrade time ?
  topher1976 Train Controller

Location: Mill Park, Vic
Ugh that sucks...

Just a bit of info, I am on the NBN and Railpage seems to be painfully slow at times!  Is an upgrade in order for you guys?
  michaelgreenhill Administrator That's Numberwang!

Location: Melbourne
Is an upgrade in order for you guys?
topher1976
Yes there is. @bevans is handling that.
  8077 Chief Train Controller

Location: Crossing the Rubicon
Yes there is. @bevans is handling that.
michaelgreenhill

Well hurry up @bevans  The system has run out of puff!

If VMWARE has run out of disk caused by snapshots then it can take a while to fix.  Why?  Because vmware needs to take all the snapshots and combine with into the guest which if there is a lot of data hours and hours.

probably why it was down for some long.
  Graham4405 The Ghost of George Stephenson

Location: Dalby Qld
vmware needs to take all the snapshots and combine with into the guest
8077
What??
  s3_gunzel Not a gunzel developer

Location: Western Sydney, AU
If VMWARE has run out of disk caused by snapshots then it can take a while to fix.  Why?  Because vmware needs to take all the snapshots and combine with into the guest which if there is a lot of data hours and hours.
8077
Snapshots are not adequate backups. If they're using snapshots as backups, there's a problem.

Dip Sys Admin 101.
  michaelgreenhill Administrator That's Numberwang!

Location: Melbourne
Snapshots are not adequate backups. If they're using snapshots as backups, there's a problem.

Dip Sys Admin 101.
s3_gunzel
Snapshots as backups are fine. Anything can be a backup, as long as it's restorable and stored on a different disk/array/server/gizmo.
  bevans Site Admin

Location: Melbourne, Australia
What??
Graham4405

@8077 is almost right.  When you remove a series of snapshots the vmware server needs to add all the changes into one file.  This took quite a while because with vmware snapshots they are a constant series of deltas.  These all need to be applied so the group of deltas can be removed.

Performance of the host system has probably also improved.  Maning Railpage has probably got a little better.
  Graham4405 The Ghost of George Stephenson

Location: Dalby Qld
@8077 is almost right.
bevans


What @8077 wrote made no sense at all. Whilst VMware is not my forté, we do use it at work and I have an esxi host at home.
Maning Railpage has probably got a little better.
bevans

Maning? Something to do with male lions perhaps?
  X'Trapolis-904M Deputy Commissioner

Location: Melbourne
Why VMware? I have never used that when running a forum.
  randomnarwhal Locomotive Driver

Why VMware? I have never used that when running a forum.
X'Trapolis-904M
Then you probably haven't done any self-managed hosting. Most servers in general, including web hosting, are now virtualised through VMWare, enabling multiple virtual servers through one physical set of hardware.
  michaelgreenhill Administrator That's Numberwang!

Location: Melbourne
Why VMware? I have never used that when running a forum.
X'Trapolis-904M
Railpage is more than a forum, matey.
  s3_gunzel Not a gunzel developer

Location: Western Sydney, AU
And VMWare is a godsend
  bevans Site Admin

Location: Melbourne, Australia
And VMWare is a godsend
s3_gunzel

Why?
  bevans Site Admin

Location: Melbourne, Australia
Railpage is more than a forum, matey.
michaelgreenhill

It is a platform and application and service suite. Lots more coming as yet.  Main focus for me this week is the Albion Cam and the new servers installation and commissioning with Mark.
  s3_gunzel Not a gunzel developer

Location: Western Sydney, AU
Snapshots as backups are fine. Anything can be a backup, as long as it's restorable and stored on a different disk/array/server/gizmo.
michaelgreenhill


Well, there you go then. I was always taught to back things up manually.

Why?
bevans
Compared to the alternatives (yes, I've dealt with a Hyper-V Cluster at TAFE)...

Needless to say, when the time came to commission a server at home, VMWare ESXi 5.5 was my product of choice

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