Denis Chudov created IGNITE-19578:
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Summary: Decrease count of lease messages to meta storage
Key: IGNITE-19578
URL: https://issues.apache.org/jira/browse/IGNITE-19578
Project: Ignite
Issue Type: Improvement
Reporter: Denis Chudov
*Motivation*
Huge number of lease messages cause serious load on meta storage, which impacts
the performance of a cluster overall. Each lease message contains prefix +
group name as a key, and the value contains leaseholder name, left and right
timestamp and couple of boolean flags.
Many leases share the same leaseholder. Also, many leases share the same right
border, as batch of leases are renewed on every iteration of lease updater and
get the same right border.
So, the compacted data structure for all leases could be a map
{code:java}
leaseholder -> set of right borders -> set of leases which contain only left
border and flags.{code}
It is important that this data structure is applicable to meta storage
representation, in-memory representation of leases should remain the same.
*Definition of done*
Count of meta storage invokes from lease updater is significantly reduced.
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