diff options
Diffstat (limited to 'configdefinitions/src/vespa/vespa.config.content.stor-distribution.def')
| -rw-r--r-- | configdefinitions/src/vespa/vespa.config.content.stor-distribution.def | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/configdefinitions/src/vespa/vespa.config.content.stor-distribution.def b/configdefinitions/src/vespa/vespa.config.content.stor-distribution.def new file mode 100644 index 00000000000..518626228c1 --- /dev/null +++ b/configdefinitions/src/vespa/vespa.config.content.stor-distribution.def @@ -0,0 +1,70 @@ +# Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root. +namespace=vespa.config.content + +## Redundancy decides how many copies of documents will be stored. Documents +## will store copies on enough nodes, such that the sum of the node reliability +## factors is equal or above the redundancy. +redundancy int default=3 + +## Initial redundancy allows put-operations to return as completed after +## a subset of all copies have been persisted (known as initial persistence +## in BCP terms). +## Set to 0 to disable and use normal redundancy behavior instead. +initial_redundancy int default=0 + +## If set, requires that the primary nodes copy should always be persisted +## before an n-of-m initial persistence operation can complete. +ensure_primary_persisted bool default=true + +## The number of copies that should be "ready" to be active. +## Maximum is redundancy. +ready_copies int default=0 + +## If this option is set true, the distributor will try to enforce one active copy +## of buckets per leaf hierarchical group. This is a simple implementation for +## search to be able to setup top level dispatcher to only send search to all +## nodes in one group as they have a static cost per node used. It used, +## hierarchical grouping can not be used for other purposes. Using this option +## implies that: +## - ready_copies == redundancy +## - Only one level of hierarchical grouping defined. +## - That level distributes copies to all defined groups. +active_per_leaf_group bool default=false + +## Search have some unfortunate properties with some queries, adding a static +## query cost, independent of the number of documents searched on a node. For +## these cases they use many small groups to be able to scale. In such cases, +## where groups are small, having distributors able to take over when none are +## available in a group is useful. +distributor_auto_ownership_transfer_on_whole_group_down bool default=true + +## Hierarchical grouping divides the nodes into a tree of groups. Due to config +## liking flat structures. The tree of groups is represented by a single array +## of groups defined here, where index is a string that can have a form like +## "1.2.1" in order to tell where in the tree structure the group is. +group[].index string +## Each group needs to have a name. Makes it easier to operations that they can +## name their groups according to what they want to call them. +group[].name string +## Capacity of the given group +group[].capacity double default=1 +## Partitions define how copies are divided among child groups/nodes. +group[].partitions string default="" +## Leaf groups will have a set of nodes within them. Branch groups will have +## none. +group[].nodes[].index int +# Whether this node is retired. +# The system will migrate all data away from retired nodes such that they can +# eventually be removed without partial data loss +group[].nodes[].retired bool default=false + +## Which disk distribution to use. From the current choices, we very much +## recommend using MODULO_BID. The only reason to use any of the earlier one is +## during an upgrade where you dont want to mess up the distribution in case you +## want to revert the upgrade. +## +## MODULO old one (4.0) +## MODULO_INDEX with node index in seed +## MODULO_KNUTH with random(node index) in seed +## MODULO_BID using all used bits, except count bits, and random(node index) +disk_distribution enum { MODULO, MODULO_INDEX, MODULO_KNUTH, MODULO_BID } default=MODULO_BID |