Search Results for : active-active

Cinder Active-Active HA – Newton mid-cycle

Last week took place the OpenStack Cinder mid-cycle sprint in Fort Collins, and on the first day we discussed the Active-Active HA effort that’s been going on for a while now and the plans for the future. This is a summary of that session. Just like in previous mid-cycles the Cinder community did its best to accommodate remote attendees and make them feel included in the sessions with hangouts, live video streaming, IRC pings as reminders, and even moving the […]

Cinder HA Active-Active specs up for review 1

It’s been some time since the last time I talked here about High Availability Active-Active configurations in Openstack’s Cinder service, and now I am quite pleased -and a little bit embarrassed it took so long- to announce that all specs are now up for reviewing. Three months ago I wrote a couple of post proposing different solutions that would allow Cinder Volume Nodes to support Active-Active configurations. One of them played with AMQP’s ACKs and was a little bit complex […]

Simpler Road to Cinder Active-Active 2

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Last week I presented a possible solution to support Active-Active configurations in Cinder, and as much as it pains me to admit it, it was too complex, so this week I’ll present a simpler solution. Change of heart I really liked last week’s solution to allow Active-Active HA configurations in Cinder, but it was brought to my attention that the complexity it added to the component was not worth the little benefits it brought (like recovering queued jobs). It didn’t […]

iSCSI multipath issues in OpenStack 7

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Multipathing is a technique frequently used in enterprise deployments to increase throughput and reliability on external storage connections, and it’s been a little bit of a pain in the neck for OpenStack users. If you’ve nodded while reading the previous statement, then this post will probably be of interest to you, as we’ll be going over some iSCSI multipath issues found in OpenStack and how they can be solved. Pain in the neck Multipath is a great feature that we […]