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
4.3. Monitoring Chunk Servers
Parameter Description
STATUS Chunk server status:
• active. The chunk server is up and running.
• Inactive. The chunk server is temporarily unavailable. A chunk server is marked as inac-
tive during its first 5 minutes of inactivity.
• offline. The chunk server is inactive for more than 5 minutes. After the chunk server
goes offline, the cluster starts replicating data to restore the chunks that were stored on
the affected chunk server.
• dropped. The chunk serve was removed by the administrator.
SPACE Total amount of disk space on the chunk server.
FREE Free disk space on the chunk server.
REPLICAS Number of replicas stored on the chunk server.
IOWAIT Percentage of time spent waiting for I/O operations being served.
IOLAT Average/maximum time, in milliseconds, the client needed to complete a single IO operation
during the last 20 seconds.
QDEPTH Average chunk server I/O queue depth.
HOST Chunk server hostname or IP address.
FLAGS The following flags may be shown for active chunk servers:
• J: The CS uses a write journal.
• C: Checksumming is enabled for the CS. Checksumming lets you know when a third party
changes the data on the disk.
• D: Direct I/O, the normal state for a CS without a write journal.
• c: The chunk server’s write journal is clean, there is nothing to commit from the write
journaling SSD to the HDD where the CS is located.
4.3.1 Understanding Disk Space Usage
Usually, you get the information on how disk space is used in your cluster with the vstorage top command. This
command displays the following disk-related information: total space, free space, and allocatable space. For
example:
45