Administrator’s Command Line Guide
Table Of Contents
- Introduction
- Accessing Acronis Storage Clusters via iSCSI
- Preparing to Work with Acronis Storage iSCSI Targets
- Creating and Running Acronis Storage iSCSI Targets
- Listing Acronis Storage iSCSI Targets
- Transferring Acronis Storage iSCSI Targets Between Acronis Storage Nodes
- Stopping Acronis Storage iSCSI Targets
- Deleting Acronis Storage iSCSI Targets
- Configuring Multipath I/O for Acronis Storage iSCSI Targets
- Managing CHAP Accounts for Acronis Storage iSCSI Targets
- Managing LUN Snapshots
- Accessing Acronis Storage Clusters via S3 Protocol
- Monitoring Acronis Storage Clusters
- Managing Cluster Security
- Maximizing Cluster Performance
Chapter 4. Monitoring Acronis Storage Clusters
Event Severity Description
The cluster is degraded with N
active, M inactive, K offline CS
MDS warn Generated when the cluster status changes to de-
graded or when a new MDS master server is elected.
This message indicates that some chunk servers in
the cluster are
• inactive (do not send any registration messages)
or
• offline (are inactive for a period longer than
mds.wd.offline_tout = 5min (by default)).
The cluster failed with N ac-
tive, M inactive, K offline CS
(mds.wd.max_offline_cs=<n>)
MDS err Generated when the cluster status changes to failed
or when a new MDS master server is elected.
This message indicates that the number of offline
chunk servers exceeds mds.wd.max_offline_cs (2 by
default). When the cluster fails, the automatic replica-
tion is not scheduled any more. So the cluster admin-
istrator must take some actions to either repair failed
chunk servers or increase the mds.wd.max_offline_cs
parameter. Setting the value of this parameter to 0
disables the failed mode completely.
The cluster is filled up to <N>% MDS info/warn Shows the current space usage in the cluster. A warn-
ing is generated if the disk space consumption equals
or exceeds 80%.
It is important to have spare disk space for data repli-
cas if one of the chunk servers fails.
Replication started, N chunks
are queued
MDS info Generated when the cluster starts the automatic data
replication to recover the missing replicas.
Replication completed MDS info Generated when the cluster finishes the automatic
data replication.
CS#<N> has reported hard error
on path
MDS warn Generated when the chunk server CS#<N> detects
disk data corruption.
You are recommended to replace chunk servers with
corrupted disks as soon as possible with new ones
and to check the hardware for errors.
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