If multiple indexes are to be built "number of indexed keys" metric may be misleading.
As a cluster admin, I'd like to know: - Are all indexes ready on a node? - How many indexes are to be built? - How much resources are used by the index building (how many threads are used)? - Which index(es?) is being built right now? - How much time until the current (single) index building finishes? Here "time" can be a lot of things: partitions, entries, percent of the cache, minutes and hours - How much time until all indexes are built? - How much does it take to build each of my indexes / a single index of my cache on average? I think we need a set of metrics and/or log messages to solve all of these questions. I imaging something like: - numberOfIndexesToBuild - a standard set of metrics on the index building thread pool (do we already have it?) - currentlyBuiltIndexName (assuming we only build one at a time which is probably not true) - for the "time" metrics I think percentage might be the best as it's the easiest to understand; we may add multiple metrics though. - For "time per each index" I'd add detailed log messages stating how long did it take to build a particular index Thanks, Stan > On 26 Jun 2020, at 12:49, ткаленко кирилл <tkalkir...@yandex.ru> wrote: > > Hi, Igniters. > > I would like to know if it is possible to estimate how much the index rebuild > will take? > > At the moment, I have found the following metrics [1] and [2] and since the > rebuild is based on caches, I think it would be useful to know how many > records are processed in indexing. This way we can estimate how long we have > to wait for the index to be rebuilt by subtracting [3] and how many records > are indexed. > > I think we should add this metric [4]. > > Comments, suggestions? > > [1] - https://issues.apache.org/jira/browse/IGNITE-12184 > [2] - > org.apache.ignite.internal.processors.cache.CacheGroupMetricsImpl#idxBuildCntPartitionsLeft > [3] - org.apache.ignite.cache.CacheMetrics#getCacheSize > [4] - org.apache.ignite.cache.CacheMetrics#getNumberIndexedKeys
