Hello, Maxim. > 1) Is it correct that readMetastore() happens after node starts> but before > including node into the ring?>
I think yes. You can have some kind of metainformation required on node join. > 5) Does in our final solution for new joined node readMetastore> and > restoreMemory should be performed in one step? I think, no. Meta Information can be required to perform restore memory. So we have to restore metainformation in first step and restore whole memory as a second step. В Пт, 03/08/2018 в 09:44 +0300, Maxim Muzafarov пишет: > Hi Igniters, > > > I'm working on bug [1] and have some questions about the final > implementation. Probably, I've already found answers on some of > them but I want to be sure. Please, help me to clarify details. > > > The key problem here is that we are reading WAL and restoring > memory state of new joined node inside PME. Reading WAL can > consume huge amount of time, so the whole cluster stucks and > waits for the single node. > > > 1) Is it correct that readMetastore() happens after node starts > but before including node into the ring? > > 2) Is after onDone() method called for LocalJoinFuture on local > node happend we can proceed with initiating PME on local node? > > 3) After reading checkpoint and restore memory for new joined > node how and when we are updating obsolete partitions update > counter? At historical rebalance, right? > > 4) Should we restoreMemory for new joined node before PME > initiates on the other nodes in cluster? > > 5) Does in our final solution for new joined node readMetastore > and restoreMemory should be performed in one step? > > > [1] https://issues.apache.org/jira/browse/IGNITE-7196
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