Weird RIAK behavior

Claudio Cesar Sanchez Tejeda demonccc.y at gmail.com
Mon Dec 22 18:59:35 EST 2014


I'm a sysadmin and I managing 5 cluster of RIAK:

- two of them are LXC containers on the same physical machine (3 nodes
per cluster)
- one of them are LXC containers located on different physical
machines (6 nodes)
- one of them are LXC containers located on different physical
machines and XEN VMs (6 nodes)
- and the last of them are VMware ESX VMs (3 nodes)

Our application works correctly on the first four clusters, but it
doesn't work as we expected on the last one.

When we update a key and we retrieve this key in order to write it
again, it has an old value (it doesn't have the first value that we
wrote), for example:

The key has: lalala
We retrieve the key, and add lololo, so it should be lalala,lololo
We retrieve the key again, and try to add lelele, so it should be now:
lalala,lololo,lelele, but when we retrieve it again, we only have:
lalala,lelele

In the second write action, when we retrieve the key, we obtained a
key with the old value. We set r, w, pr and rw to 3 to the REST
requests, but it doesn't help.

All the configuration files are very similiar and we don't have any
major differences in the disk I/O and network performance of the nodes
of the clusters.

Did anyone have a similar issue?

Regards.




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