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Posted to issues@bookkeeper.apache.org by GitBox <gi...@apache.org> on 2020/11/26 17:46:13 UTC

[GitHub] [bookkeeper] merlimat commented on issue #2497: Bookkeeper crashes under high load

merlimat commented on issue #2497:
URL: https://github.com/apache/bookkeeper/issues/2497#issuecomment-734423246


   > A back-pressure mechanism to prevent crashes and adjust the client's write throughput to what the server can absorb.
   
   The problem is in that there is no back-pressure in the client when `ack < write`. 
   
   With `3-3-2`, for example, if one bookie is slower the client will retain the original entry until it's acked by the 3 bookies, making the amount of memory required in bk client to be unbound.
   


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