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[#234] services/object: Support netmap epoch and lookup dead in read ops

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Support processing of NetmapEpoch and NetmapLookupDepth X-headers when
processing object read operations. Placement for operations
Get/Head/GetRange/GetRangeHash/Search is built for the epoch specified in
NetmapEpoch X-header (by default latest). Also the specified operations are
processed until success is achieved for network maps from the past up to
NetmapLookupDepth value. Behavior for default values (zero or missing) left
unchanged.

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
This commit is contained in:
Leonard Lyubich 2021-01-12 17:55:02 +03:00 • committed by Alex Vanin
parent 2f4d90025f
commit 1e170c3812
22 changed files with 615 additions and 92 deletions
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11
pkg/services/object/util/placement.go
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@ -116,12 +116,13 @@ func (g *TraverserGenerator) WithTraverseOptions(opts ...placement.Option) *Trav
}
}
// GenerateTraverser generates placement Traverser for provided object address.
func (g *TraverserGenerator) GenerateTraverser(addr *object.Address) (*placement.Traverser, error) {
// get latest network map
nm, err := netmap.GetLatestNetworkMap(g.netMapSrc)
// GenerateTraverser generates placement Traverser for provided object address
// using epoch-th network map.
func (g *TraverserGenerator) GenerateTraverser(addr *object.Address, epoch uint64) (*placement.Traverser, error) {
// get network map by epoch
nm, err := g.netMapSrc.GetNetMapByEpoch(epoch)
if err != nil {
return nil, errors.Wrapf(err, "could not get latest network map")
return nil, errors.Wrapf(err, "could not get network map #%d", epoch)
}
// get container related container