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System Requirements - EXPRESSCLUSTER X 4.3 for Linux

The following tables provides general description of the EXPRESSCLUSTER system requirements for informational purpose only. Please consult your regional NEC representative for actual product offering and ordering information.

EXPRESSCLUSTER Server

Machine x86_64 server
IBM POWER server
IBM POWER LE server
OS x86_64
Red Hat Enterprise Linux 8.2
Red Hat Enterprise Linux 8.1
Red Hat Enterprise Linux 7.9
Red Hat Enterprise Linux 7.8
Red Hat Enterprise Linux 7.7
Red Hat Enterprise Linux 7.6
Red Hat Enterprise Linux 7.5
Red Hat Enterprise Linux 7.4
Red Hat Enterprise Linux 7.3
Red Hat Enterprise Linux 7.2
Red Hat Enterprise Linux 6.10
Red Hat Enterprise Linux 6.9
Red Hat Enterprise Linux 6.8
MIRACLE LINUX 8 Asianux Inside
Asianux Server 7 ==MIRACLE LINUX V7 (SP3)
Asianux Server 7 ==MIRACLE LINUX V7 (SP2)
Asianux Server 7 ==MIRACLE LINUX V7 (SP1)
Asianux Server 4 ==MIRACLE LINUX V6 (SP7)
Asianux Server 4 ==MIRACLE LINUX V6 (SP6)
Novell SUSE LINUX Enterprise Server 15 (SP2)
Novell SUSE LINUX Enterprise Server 15 (SP1)
Novell SUSE LINUX Enterprise Server 15
Novell SUSE LINUX Enterprise Server 12 (SP5)
Novell SUSE LINUX Enterprise Server 12 (SP4)
Novell SUSE LINUX Enterprise Server 12 (SP2)
Novell SUSE LINUX Enterprise Server 12 (SP1)
Novell SUSE LINUX Enterprise Server 11 (SP4)
Novell SUSE LINUX Enterprise Server 11 (SP3)
Oracle Linux 7.7 UEK5
Oracle Linux 7.5
Oracle Linux 7.3 UEK4
Oracle Linux 6.6
Ubuntu 20.04.1 LTS
Ubuntu 18.04.3 LTS
Ubuntu 16.04.3 LTS
Ubuntu 14.04 LTS
Amazon Linux 2

IBM POWER (Replicator, Replicator DR, Agents except Database Agent are not supported)
Red Hat Enterprise Linux 7.6
Red Hat Enterprise Linux 7.5
Red Hat Enterprise Linux 7.4
Red Hat Enterprise Linux 7.3
Red Hat Enterprise Linux 6.10
Red Hat Enterprise Linux 6.9
Red Hat Enterprise Linux 6.8
Novell SUSE LINUX Enterprise Server 11 (SP4)

IBM POWER LE (Replicator, Replicator DR and Agents are not supported)
Red Hat Enterprise Linux 8.2
Red Hat Enterprise Linux 8.1
Red Hat Enterprise Linux 7.8
Red Hat Enterprise Linux 7.7
Red Hat Enterprise Linux 7.6
Red Hat Enterprise Linux 7.5
Red Hat Enterprise Linux 7.4
Red Hat Enterprise Linux 7.3
Novell SUSE LINUX Enterprise Server 12 (SP2)
Novell SUSE LINUX Enterprise Server 12 (SP1)

(*) For the kernel version of CentOS supported by EXPRESSCLUSTER, see the supported kernel version of Red Hat Enterprise Linux.
Memory User mode : 200MB(excepting for optional products)

Kernel mode :
When the synchronization mode is used:
1MB + (number of request queues x I/O size) + (2MB + Difference Bitmap Size x number of mirror disk resources and hybrid disk resources)

When the asynchronous mode is used:
1MB + (number of request queues x I/O size) + (3MB + (number of asynchronous queues x I/O size) + (I/O size / 4KB x 8B + 0.5KB) x (max size of history file / I/O size + number of asynchronous queues) + (Difference Bitmap Size) ) x number of mirror disk resources and hybrid disk resources

When the kernel mode LAN heartbeat driver is used:
8MB

When the keepalive driver is used:
8MB

(*) Estimated I/O size is as follows:
     - 1MB (Ubuntu16)
     - 124KB (Ubuntu14, RHEL7)
     - 4KB (RHEL6)
(*) For the setting value of the number of request queues and asynchronization queues, see “Understanding mirror disk resources” of “Group resource details” in the "Reference Guide".
Disk Right after installation : 300MB
During operation : 5.0GB
Supported distributions and kernel versions

Cluster WebUI

Browser Microsoft Internet Explorer 11
Microsoft Internet Explorer 10
Firefox
Google Chrome
Microsoft Edge (Chromium)
Memory 500MB or more
Disk 200MB or more