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 6. Maximizing Cluster Performance
To be on the safe side, repeat the procedure several times. Once you check your first storage device, continue
with all remaining devices you plan to use in the cluster.
6.3 Using 1 GbE and 10 GbE Networks
1 Gbit/s Ethernet networks can deliver 110-120 MB/s, which is close to a single drive performance on sequential
I/O. Since several drives on a single server can deliver higher throughput than a single 1 Gbit/s Ethernet link,
networking may become a bottleneck.
However, in real-life applications and virtualized environments, sequential I/O is not common (backups mainly)
and most of the I/O operations are random. Thus, typical HDD throughput is usually much lower, close to 10-20
MB/s, according to statistics accumulated from hundreds of servers by a number of major hosting companies.
Based on these two observations, we recommend to use one of the following network configurations (or bet-
ter):
• A 1 Gbit/s link per each 2 HDDs on the Hardware Node. Although if you have 1 or 2 HDDs on a Hardware
Node, two bonded network adapters are still recommended for better reliability (see Setting Up Network
Bonding on page 67).
• A 10 Gbit/s link per Hardware Node for the maximum performance.
The table below illustrates how these recommendations may apply to a Hardware Node with 1 to 6 HDDs:
HDDs 1 GbE Links 10 GbE Links
1 1 (2 for HA) 1 (2 for HA)
2 1 (2 for HA) 1 (2 for HA)
3 2 1 (2 for HA)
4 2 1 (2 for HA)
5 3 1 (2 for HA)
6 3 1 (2 for HA)
Note:
1. For the maximum sequential I/O performance, we recommend to use one 1Gbit/s link per each hard
drive, or one 10Gbit/s link per Hardware Node.
2. It is not recommended to configure 1 Gbit/s network adapters to use non-default MTUs (e.g., 9000-
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