func check_backend(ch *elliptics.DChannel, s *elliptics.Session, addr *elliptics.DnetAddr, backend_id int32, ro bool, delay uint32) error {
checked := false
for t := range ch.Out {
st := t.(*elliptics.DnetBackendsStatus)
if st.Error != nil {
return st.Error
}
for _, b := range st.Backends {
if b.Backend == backend_id {
if b.RO != ro {
return fmt.Errorf("backend: %d: read-only mismatch: read: %v, must be: %v",
backend_id, b.RO, ro)
}
if b.Delay != delay {
return fmt.Errorf("backend: %d: delay mismatch: read: %v, must be: %v",
backend_id, b.Delay, delay)
}
checked = true
break
}
}
}
if !checked {
return fmt.Errorf("backend: %d: could not find backend", backend_id)
}
checked = false
for t := range s.BackendsStatus(addr).Out {
st := t.(*elliptics.DnetBackendsStatus)
if st.Error != nil {
return st.Error
}
for _, b := range st.Backends {
if b.Backend == backend_id {
if b.RO != ro {
return fmt.Errorf("backend: %d: check: read-only mismatch: read: %v, must be: %v",
backend_id, b.RO, ro)
}
if b.Delay != delay {
return fmt.Errorf("backend: %d: check: delay mismatch: read: %v, must be: %v",
backend_id, b.Delay, delay)
}
checked = true
break
}
}
}
if !checked {
return fmt.Errorf("backend: %d: could not find backend", backend_id)
}
return nil
}
func (bctl *BucketCtl) SetGroupsTimeout(s *elliptics.Session, bucket *Bucket, key string) {
// sort groups by defrag state, increase timeout if needed
groups := make([]uint32, 0)
defrag_groups := make([]uint32, 0)
timeout := 30
for group_id, sg := range bucket.Group {
sb, err := sg.FindStatBackendKey(s, key, group_id)
if err != nil {
continue
}
if sb.DefragState != 0 {
defrag_groups = append(defrag_groups, group_id)
} else {
groups = append(groups, group_id)
}
}
// Not being defragmented backends first, then those which are currently being defragmented
groups = append(groups, defrag_groups...)
if len(groups) == len(defrag_groups) {
timeout = 90
}
// if there are no backends being defragmented, use weights to mix read states
// if there are such backends, use strict order and read from non-defragmented backends first
ioflags := elliptics.IOflag(bctl.Conf.Proxy.ReaderIOFlags) | s.GetIOflags()
if len(defrag_groups) == 0 {
ioflags |= elliptics.DNET_IO_FLAGS_MIX_STATES
}
s.SetIOflags(ioflags)
// there are no stats for bucket groups, use what we have in metadata
if len(groups) == 0 {
groups = bucket.Meta.Groups
}
s.SetGroups(groups)
s.SetTimeout(timeout)
}