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    ApsaraDB for MongoDB:Replica set instance specifications

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    ApsaraDB for MongoDB:Replica set instance specifications

    Last Updated:Jan 19, 2026

    This topic describes the instance types available for ApsaraDB for MongoDB replica set instances.

    Note

    • The memory specified for an instance type includes memory used by MongoDB management services, database services, and the underlying operating system. This includes memory reserved for the BIOS, kernel, and hypervisor. Therefore, the available memory is less than the memory specified for the instance type.

    • Some instance types were upgraded on May 14, 2024. If the maximum connections for your instance does not match the value specified in this document, restart the instance to use the adjusted maximum connections. For more information, see Notification: Upgrade to Maximum Connections for Some ApsaraDB for MongoDB Instance Types.

    Important

    A single collection file cannot exceed 16 TB. Otherwise, the instance becomes unavailable.

    Cloud Disk Version

    The following database versions are supported:

    • MongoDB 8.0

    • MongoDB 7.0

    • MongoDB 6.0

    • MongoDB 5.0

    • MongoDB 4.4

    Note

    For more information about the maximum IOPS and throughput of different disk types, see ESSD disks and ESSD AutoPL disks.

    Instance type class

    Specifications

    Instance type code

    Maximum connections

    Maximum IOPS

    Maximum throughput (MB/s)

    Storage space

    Dedicated disk version

    2-core 8 GB

    mdb.shard.4x.large.d

    5000

    min{1800 + 50 × Storage space, 10000, Maximum IOPS of the selected disk type}

    min{120 + 0.5 × Storage space, 128, Maximum throughput of the selected disk type}

    • PL1 ESSD: 20 GB to 16000 GB, with a step size of 10 GB.

    • PL2 ESSD: 470 GB to 16000 GB, with a step size of 10 GB.

    • PL3 ESSD: 1270 GB to 16000 GB, with a step size of 10 GB.

    • ESSD AutoPL disk: 40 GB to 16000 GB, with a step size of 10 GB.

    2-core 16 GB

    mdb.shard.8x.large.d

    8000

    4-core 8 GB

    mdb.shard.2x.xlarge.d

    8000

    min{1800 + 50 × Storage space, 20000, Maximum IOPS of the selected disk type}

    min{120 + 0.5 × Storage space, 192, Maximum throughput of the selected disk type}

    4-core 16 GB

    mdb.shard.4x.xlarge.d

    8000

    4-core 32 GB

    mdb.shard.8x.xlarge.d

    12000

    8-core 16 GB

    mdb.shard.2x.2xlarge.d

    12000

    min{1800 + 50 × Storage space, 25000, Maximum IOPS of the selected disk type}

    min{120 + 0.5 × Storage space, 256, Maximum throughput of the selected disk type}

    8-core 32 GB

    mdb.shard.4x.2xlarge.d

    16000

    8-core 64 GB

    mdb.shard.8x.2xlarge.d

    16000

    16-core 32 GB

    mdb.shard.2x.4xlarge.d

    16000

    min{1800 + 50 × Storage space, 40000, Maximum IOPS of the selected disk type}

    min{120 + 0.5 × Storage space, 384, Maximum throughput of the selected disk type}

    16-core 64 GB

    mdb.shard.4x.4xlarge.d

    32000

    16-core 128 GB

    mdb.shard.8x.4xlarge.d

    32000

    32-core 64 GB

    mdb.shard.2x.8xlarge.d

    32000

    min{1800 + 50 × Storage space, 60000, Maximum IOPS of the selected disk type}

    min{120 + 0.5 × Storage space, 640, Maximum throughput of the selected disk type}

    32-core 128 GB

    mdb.shard.4x.8xlarge.d

    96000

    32-core 256 GB

    mdb.shard.8x.8xlarge.d

    96000

    64-core 128 GB

    mdb.shard.2x.16xlarge.d

    96000

    min{1800 + 50 × Storage space, 300000, Maximum IOPS of the selected disk type}

    min{120 + 0.5 × Storage space, 2048, Maximum throughput of the selected disk type}

    64-core 256 GB

    mdb.shard.4x.16xlarge.d

    128000

    64-core 512 GB

    mdb.shard.8x.16xlarge.d

    128000

    General-purpose disk version

    2-core 4 GB

    mdb.shard.2x.large.c

    3000

    min{1800 + 50 × Storage space, 10500, Maximum IOPS of the selected disk type}

    min{120 + 0.5 × Storage space, 128, Maximum throughput of the selected disk type}

    2-core 8 GB

    mdb.shard.4x.large.c

    3000

    4-core 8 GB

    mdb.shard.2x.xlarge.c

    6000

    min{1800 + 50 × Storage space, 21000, Maximum IOPS of the selected disk type}

    min{120 + 0.5 × Storage space, 192, Maximum throughput of the selected disk type}

    4-core 16 GB

    mdb.shard.4x.xlarge.c

    6000

    8-core 16 GB

    mdb.shard.2x.2xlarge.c

    12000

    min{1800 + 50 × Storage space, 26250, Maximum IOPS of the selected disk type}

    min{120 + 0.5 × Storage space, 256, Maximum throughput of the selected disk type}

    8-core 32 GB

    mdb.shard.4x.2xlarge.c

    16000

    16-core 32 GB

    mdb.shard.2x.4xlarge.c

    16000

    min{1800 + 50 × Storage space, 42000, Maximum IOPS of the selected disk type}

    min{120 + 0.5 × Storage space, 384, Maximum throughput of the selected disk type}

    16-core 64 GB

    mdb.shard.4x.4xlarge.c

    32000

    32-core 64 GB

    mdb.shard.2x.8xlarge.c

    32000

    min{1800 + 50 × Storage space, 50000, Maximum IOPS of the selected disk type}

    min{120 + 0.5 × Storage space, 640, Maximum throughput of the selected disk type}

    The 64-core 128 GB, 64-core 256 GB, and 64-core 512 GB Dedicated disk-based instance types are available only in Zones A, B, and C of the Singapore region.

    General-purpose disk-based instance types are available in the following regions and zones:

    • China (Hangzhou): Zones J.

    • China (Shanghai): Zones B, L, and N.

    • China (Beijing): Zones H, and K.

    • China (Shenzhen): Zone D

    • China (Hong Kong): Zones B and C.

    • Singapore: Zone A.

    • US (Silicon Valley): Zones A and B.

    • US (Virginia): Zones A and B.

    Note

    • If you select multi-zone deployment when you create an instance, confirm that the destination region supports the selected instance type.

    • General-purpose disk-based instance types do not support disk encryption.

    • General-purpose disk-based instance types are not available in all regions. If you cannot find the corresponding instance types in the console for a region, you can submit a ticket to request access.

    Local disk version

    The following database versions are supported:

    • MongoDB 4.2

    • MongoDB 4.0

    • MongoDB 3.4 (discontinued)

    Specification Type

    Specifications

    Instance type code

    Maximum connections

    Maximum IOPS

    Storage space

    General-purpose local disk version

    1-core 2 GB

    dds.mongo.mid

    1000

    8000

    10 GB to 2000 GB, with a step size of 10 GB.

    2-core 4 GB

    dds.mongo.standard

    3000

    8000

    4-core 8 GB

    dds.mongo.large

    6000

    8000

    8-core 16 GB

    dds.mongo.xlarge

    9000

    8000

    8-core 32 GB

    dds.mongo.2xlarge

    16000

    14000

    16-core 64 GB

    dds.mongo.4xlarge

    32000

    16000

    Dedicated local disk version

    2-core 16 GB

    mongo.x8.medium

    8000

    8000

    10 GB to 3000 GB, with a step size of 10 GB.

    4-core 32 GB

    mongo.x8.large

    8000

    9000

    8-core 64 GB

    mongo.x8.xlarge

    16000

    18000

    16-core 128 GB

    mongo.x8.2xlarge

    32000

    36000

    32-core 256 GB

    mongo.x8.4xlarge

    64000

    72000

    Dedicated physical server

    60-core 440 GB

    dds.mongo.2xmonopolize

    100000

    100000

    2000 GB to 6000 GB, with a step size of 10 GB.

    90-core 660 GB

    dds.mongo.3xmonopolize

    100000

    100000

    2000 GB to 6000 GB, with a step size of 10 GB.