| Gehel claimed this task. Gehel added a comment. |
Side note: at this point, the need to increase hardware is more for availability than for scalability.
Constraints:
- We want to be able to continue operations in the case where we loose a datacenter, including normal maintenance operations.
- Each data center is serving traffic in a completely isolated manner, users are sent to a specific datacenter based on network proximity. The implication here is that we don't want to rely on the secondary datacenter for the reliability of the main cluster.
- WDQS sometimes need full data reload, where a server being reloaded needs to be taken out of traffic for multiple days. At the moment, our clusters are composed of 2 nodes, which means that during maintenance, we are running on a single node.
Goal:
- Increase the size of both eqiad and codfw WDQS clusters to 3 nodes (adding 1 node to each cluster)
Notes:
- If budget is an issue, adding a node to eqiad should be the priority. That way, we can operate the eqiad cluster comfortably and in case we need to switch to codfw we accept to be in a degraded situation where major maintenance operations might be delayed. This is only a transitory solution. Once we have active/active clusters, codfw will need to be operable just as much as eqiad.
- This request is similar to T139482
Sizing:
Hardware should be similar to the current wdqs200[12] configuration:
CPU: dual Intel(R) Xeon(R) CPU E5-2620 v3
Disk: 800GB raw raided space SSD
RAM: 96GB
number of servers:
eqiad: 1
codfw: 1 (we might be able to do without the codfw server in the short term if that is an issue)
TASK DETAIL
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To: Gehel
Cc: Gehel, Aklapper, Deskana, Smalyshev, mschwarzer, Avner, debt, D3r1ck01, Jonas, FloNight, Xmlizer, Izno, jkroll, Wikidata-bugs, Jdouglas, aude, Manybubbles, Mbch331
Cc: Gehel, Aklapper, Deskana, Smalyshev, mschwarzer, Avner, debt, D3r1ck01, Jonas, FloNight, Xmlizer, Izno, jkroll, Wikidata-bugs, Jdouglas, aude, Manybubbles, Mbch331
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