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* vmselect: introduce `search.skipSlowReplicas` cmd-line flag vmselect has two logical conditions during request processing when `-replicationFactor` cmd-line flag is set: 1. If at least `len(storageNodes) - replicationFactor` responded, it could skip waiting for the rest of nodes to respond. This could lead to problems described here https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1207. 2. Mark response as partial if less than `len(storageNodes) - replicationFactor` responded without an error. The P1 showed itself error-prone and became the main reason why `-replicationFactor` wasn't recommended to use at vmselect level. However, this optimization could be still very useful in situations when there are slow and fast replicas in cluster. But P2 remains viable and important conditionless. Hiding P1 behind the feature-flag `search.skipSlowReplicas` should make `-replicationFactor` flag usable again. And let users choose whether they want P1 to be respected. Related issues https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1207 https://github.com/VictoriaMetrics/VictoriaMetrics/issues/711 Signed-off-by: hagen1778 <roman@victoriametrics.com> * docs: update changelog Signed-off-by: hagen1778 <roman@victoriametrics.com> --------- Signed-off-by: hagen1778 <roman@victoriametrics.com> |
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| .. | ||
| clusternative | ||
| deployment | ||
| graphite | ||
| graphiteql | ||
| multiarch | ||
| netstorage | ||
| prometheus | ||
| promql | ||
| querystats | ||
| searchutils | ||
| static/css | ||
| vmui | ||
| main.go | ||
| Makefile | ||
| README.md | ||
| vmui.go | ||
vmselect performs the following tasks:
-
Splits incoming selects to tasks for
vmstoragenodes and issues these tasks to all thevmstoragenodes in the cluster. -
Merges responses from all the
vmstoragenodes and returns a single response.
The vmui directory contains static contents built from app/vmui package with make vmui-update command. The vmui page is available at http://<vmselect>:8481/select/<accountID>/vmui/.