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System Requirements - EXPRESSCLUSTER X for Linux

EXPRESSCLUSTER X 5.0

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 LE server(Replicator and each Agents are not supported)
OS x86_64
Red Hat Enterprise Linux 8.4
Red Hat Enterprise Linux 8.2
Red Hat Enterprise Linux 8.1
Red Hat Enterprise Linux 7.9
MIRACLE LINUX 8.4
Novell SUSE LINUX Enterprise Server 15 (SP3)
Novell SUSE LINUX Enterprise Server 15 (SP2)
Novell SUSE LINUX Enterprise Server 12 (SP5)
Oracle Linux 8.3
Oracle Linux 7.7 UEK5
Ubuntu 20.04.3 LTS
Ubuntu 20.04 LTS
Amazon Linux 2

IBM POWER LE (Replicator, Replicator DR and Agents are not supported)
Red Hat Enterprise Linux 8.4
Red Hat Enterprise Linux 8.2
Red Hat Enterprise Linux 8.1
Red Hat Enterprise Linux 7.9

(*) 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.)

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:
     - 2MB (RHEL8)
     - 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".
(*) For the required size of a partition for a disk heartbeat resource, see "Shared disk".
(*) For the required size of a cluster partition, see "Mirror disk" and "Hybrid disk".

Disk

Right after installation : 300MB
During operation : 5.0GB + 1.0GB(A disk capacity required to use mirror disk resources and hybrid disk resources.)

Supported distributions and kernel versions
EXPRESSCLUSTER X 5.0 EXPRESSCLUSTER X 4.3 EXPRESSCLUSTER X 3.3

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

EXPRESSCLUSTER X SingleServerSafe 5.0

The following tables provides general description of the EXPRESSCLUSTER X SingleServerSafe 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
OS Red Hat Enterprise Linux 8.4
Red Hat Enterprise Linux 8.2
Red Hat Enterprise Linux 8.1
Red Hat Enterprise Linux 7.9
MIRACLE LINUX 8.4
Novell SUSE LINUX Enterprise Server 15 (SP3)
Novell SUSE LINUX Enterprise Server 15 (SP2)
Novell SUSE LINUX Enterprise Server 12 (SP5)
Oracle Linux 8.3
Oracle Linux 7.7 UEK5
Ubuntu 20.04.3 LTS
Ubuntu 20.04 LTS
Amazon Linux 2

(*) 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 keepalive driver is used, 8MB
Disk Right after installation : 300MB
During operation : 2.0GB
Supported distributions and kernel versions
EXPRESSCLUSTER X SingleServerSafe 5.0 EXPRESSCLUSTER X SingleServerSafe 4.3 EXPRESSCLUSTER X SingleServerSafe 3.3

Cluster WebUI

Browser Microsoft Internet Explorer 11
Microsoft Internet Explorer 10
Firefox
Google Chrome
Microsoft Edge (Chromium)
Memory User mode : 500MB