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Avaya Modular Messaging Concepts and Planning Guide
11-4 November 2004
Avaya Modular Messaging Concepts and
Planning Guide
Avaya Message Storage Server capacities
Table 11-2 provides information on the capacities of an Avaya Message
Storage Server (MSS), the high-availability configuration (MSS—H) and
the standard-availability configuration (MSS—S).
Note: Capacities for single Microsoft Exchange and IBM Lotus
Domino servers are not controlled by Avaya and must be
determined from Microsoft and IBM.
Table 11-2. MSS capacities
Feature MSS—S MSS—H
Disk storage (number of disks @ size) 2 @ 80 GB
1
3 @ 72 GB
2
Hours of storage
3
! Using GSM encoding
! Using G.711 encoding
7,500
1,500
15,000
3,000
Subscriber mailboxes
! Maximum local subscribers
! Maximum remote networked subscribers
(includes spoken names)
20,000
250,000
20,000
250,000
IMAP4 client sessions
These capacities exclude MAS IMAP4 usage and
include Client Add-in for Microsoft Outlook IMAP4
usage.
1,000 1,000
POP3 client sessions
! Maximum number of clients (clients poll every 10
minutes)
! Maximum number of active client sessions
5000
24
5000
24
SMTP messages per hour. This includes
MAS-initiated deliveries.
15,000 15,000
1. With software mirroring, two disks provide the actual storage capacity of only one disk.
2. With RAID Level 5, three disks provide the actual storage capacity of only two disks.
3. The MSS calculations account for the need to have at least 20% free space available for the system to
run. Thus system free space is built into these calculations for the MSS.