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Christian Haudum ce81895241 Add shuffle sharding to index gateway (#9710) ... This PR introduces shuffle sharding of the index files across index gateways where the shuffle sharding key is the tenant ID. Instead of having a global replication factor on the index gateways which affects all tenants the same, whether they are small or large tenants, the shuffle sharding allows to specify a shard factor per tenant (on top of the replication factor). This a) reduces the amount of indexes that are downloaded on individual index gateways in case of a high replication factor (which is currently the de-factor standard to deal with high load) and b) allows to scale tenants individually. The shuffle sharding algorithm is part of dskit's ring implementation and is not part of this commit. If you have set a high RF for the index gateways, it is required to reduce the RF and instead set the shard factor for the tenants. Signed-off-by: Christian Haudum <christian.haudum@gmail.com>		3 years ago
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_index.md	Add shuffle sharding to index gateway (#9710)	3 years ago