# Replica Fall **URL:** \ **Category:** Elasticsearch\ **Created:** [February 25, 2013, 4:38pm UTC](https://discuss.elastic.co/t/replica-fall/10885 "2013-02-25T16:38:30Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Ophir\_Michaeli](https://avatars.discourse-cdn.com/v4/letter/o/9f8e36/32.png) [@Ophir\_Michaeli](https://discuss.elastic.co/u/Ophir_Michaeli)\ **Post date:** [February 25, 2013, 4:38pm UTC](https://discuss.elastic.co/t/replica-fall/10885/1 "2013-02-25T16:38:30Z")
Hi, If a replica shard falls for a long time and then is up again, does this replica overwritten by the replica created in another node or does being updated only with the missing parts. If the new replica overrides the old, does it create a traffic issue, if the replica is very big? Thanks, Ophir -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). For more options, visit [https://groups.google.com/groups/opt\_out](https://groups.google.com/groups/opt_out). ---
**Author:** ![drewr](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/drewr/32/7803_2.png) [@drewr](https://discuss.elastic.co/u/drewr)\ **Post date:** [February 25, 2013, 4:56pm UTC](https://discuss.elastic.co/t/replica-fall/10885/2 "2013-02-25T16:56:17Z")
Ophir Michaeli wrote: > If a replica shard falls for a long time and then is up again, does > this replica overwritten by the replica created in another node or > does being updated only with the missing parts. Depends on what data is lost. ES can avoid recopying data if there are Lucene segments intact on the replica. > If the new replica overrides the old, does it create a traffic > issue, if the replica is very big? ES will throttle the number of replications per node to attempt to not saturate the network. If the shard is large, though, it can indeed take a while to copy. This is almost entirely dependent on the network. ES adds negligible overhead here. -Drew -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). For more options, visit [https://groups.google.com/groups/opt\_out](https://groups.google.com/groups/opt_out). ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [July 6, 2017, 2:49am UTC](https://discuss.elastic.co/t/replica-fall/10885/3 "2017-07-06T02:49:39Z")
Closed on July 6, 2017, 2:49am UTC