The following table provides guidance about database and log file choices. High availability: Database and Stand-alone: supported/best log file options Description supported/best practices practices File placement: Database/log Best practice: For Isolation of logs and Database/log isolation refers to recoverability, move databases isn't isolation placing the database file (.edb) and required. database file and logs from the same logs from the same database to different mailbox database volumes backed by onto different different physical disks. volumes backed by different physical disks. File placement: Database Best practice: Based on Supported: When Database files/volume refers your backup methodology. using JBOD, divide files/volume to how you distribute a single disk into two database files within volumes (one for or across disk database, one for volumes. log stream). File placement: Log streams/volume Best practice: Based on Supported: When Log refers to how you your backup methodology. using JBOD, divide streams/volume distribute database a single disk into two log files within or volumes (one for across disk database, one for volumes. log stream). Best practice: When using JBOD, single database per log per volume. Database size The on disk Supported: Approximately Supported: database file size 16 terabytes (TB) Approximately 16 TB (.edb). Best practice: Best practice: 100 gigabytes (GB) 2 TB or less. or less. Provision for Provision for 120 120 percent of percent of calculated calculated maximum database maximum size. database size.
The following table provides guidance about database and log file choices. Database and log file options Description Stand-alone: supported/best practices High availability: supported/best practices File placement: Database/log isolation Database/log isolation refers to placing the database file and logs from the same mailbox database onto different volumes backed by different physical disks. Best practice: For recoverability, move database file (.edb) and logs from the same database to different volumes backed by different physical disks. Isolation of logs and databases isn't required. File placement: Database files/volume Database files/volume refers to how you distribute database files within or across disk volumes. Best practice: Based on your backup methodology. Supported: When using JBOD, divide a single disk into two volumes (one for database, one for log stream). File placement: Log streams/volume Log streams/volume refers to how you distribute database log files within or across disk volumes. Best practice: Based on your backup methodology. Supported: When using JBOD, divide a single disk into two volumes (one for database, one for log stream). Best practice: When using JBOD, single database per log per volume. Database size The on disk database file size (.edb). Supported: Approximately 16 terabytes (TB) Best practice: 100 gigabytes (GB) or less. Provision for 120 percent of calculated maximum database size. Supported: Approximately 16 TB Best practice: 2 TB or less. Provision for 120 percent of calculated maximum database size.