Arthur Naseef created IGNITE-17274:
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Summary: Startup of large numbers of servers slowed by linear
lookup in IgniteServiceProcessor
Key: IGNITE-17274
URL: https://issues.apache.org/jira/browse/IGNITE-17274
Project: Ignite
Issue Type: Improvement
Affects Versions: 2.13
Reporter: Arthur Naseef
Using a small POC, spinning up many servers is slow. In addition, the startup
time appears to be exponential.
Using timing measurements, found a linear lookup inside the
IgniteServiceProcessor that is taking most of the time.
Replacing that linear lookup with a Map lookup, and maintaining the map,
significantly speeds up the process, and startup time is now linear with the
number of services started.
Note this was tested with 20K and 50K services on a 1-node ignite cluster.
Timings against the stock 2.13.0 code come in at 30s for 20K and 250s for 50K
services. Modifying the linear lookup to use a Map, the timing come in at 8s
for 20K and 14s for 50K services.
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