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    Cloud Parallel File Storage:Specifications

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    Cloud Parallel File Storage:Specifications

    Last Updated:Apr 30, 2026

    CPFS General-purpose Edition offers two storage classes: 100 MB/s/TiB Baseline and 200 MB/s/TiB Baseline. This topic compares their performance metrics, supported advanced features, and dataflow performance for the same capacity to help you choose the class that best fits your business needs.

    File system instance performance

    CPFS General-purpose Edition supports access through CPFS-POSIX and CPFS-NFS clients. The following sections compare the throughput, IOPS, and I/O latency for each storage class at the same capacity across both client types.

    Choose between CPFS-POSIX and CPFS-NFS

    If you do not have extreme performance requirements, we recommend using a CPFS-NFS client for a better user experience. To do so, enable the General-purpose protocol service in the console.

    CPFS-NFS supports the following operating systems:

    Operating system

    Operating system version

    Alibaba Cloud Linux

    • Alibaba Cloud Linux 3.2104 64-bit

    • Alibaba Cloud Linux 2.1903 64-bit

    CentOS

    • CentOS 8.x 64-bit

    • CentOS 7.x 64-bit

    Ubuntu

    • Ubuntu 20.04 64-bit

    • Ubuntu 18.04 64-bit

    • Ubuntu 16.04 64-bit

    Debian

    • Debian 10.x 64-bit

    • Debian 9.x 64-bit

    • Debian 8.x 64-bit

    SUSE

    • SUSE Linux Enterprise Server 15 64-bit

    For workloads that require extreme performance, use a CPFS-POSIX client if your environment meets the following conditions:

    • You do not rely on the Container Storage Interface (CSI) to access CPFS.

    • You do not use mmap.

    • Your operating system is one of the following versions:

      Operating system

      Distribution

      Kernel version

      Alibaba Cloud Linux

      Alibaba Cloud Linux 2.1903 64-bit

      4.19.91-27.4.al7.x86_64 and earlier

      RHEL or CentOS

      8.4

      4.18.0-305.19.1.el8_4

      8.3

      4.18.0-240.22.1.el8_3

      8.2

      4.18.0-193.28.1.el8_2

      8.1

      4.18.0-147.8.1.el8_1

      8.0

      4.18.0-80.11.2.el8_0

      7.9

      3.10.0-1160.42.2.el7

      7.8

      3.10.0-1127.19.1.el7

      7.7

      3.10.0-1062.18.1.el7

      7.6

      3.10.0-957.54.1.el7

      7.5

      3.10.0-862.14.4.el7

      7.4

      3.10.0-693.2.2.el7

      7.3

      3.10.0-514.26.2.el7

      7.2

      3.10.0-514.26.2.el7

      Ubuntu

      20.04.3 LTS

      5.4.0-86-generic

    CPFS-POSIX

    CPFS file systems that use zone-redundant storage (ZRS) do not support the POSIX protocol.

    After you create a CPFS-POSIX mount target, you can access the file system with a CPFS-POSIX client.

    Important

    • Check the performance of your file system based on its creation time, version number, and region.

    • For more information about how to view the version number of a file system, see View the version number of a file system.

    After January 22, 2024

    As of January 22, 2024, the performance of 100 MB/s/TiB Baseline and 200 MB/s/TiB Baseline file systems has been upgraded in select regions. Performance in other regions remains unchanged.

    File systems created before this date are not automatically upgraded. To use the upgraded performance, create a new CPFS General-purpose Edition file system and migrate your data to it.

    Metric

    100 MB/s/TiB Baseline

    200 MB/s/TiB Baseline

    File system version number

    v2.3.4 and later

    v2.3.4 and later

    Supported regions and zones

    Click to view supported regions and zones

    • China (Hangzhou): Zone I, Zone J, and Zone K

    • China (Shanghai): Zone B, Zone M, Zone N, and Zone L

    • China (Shenzhen): Zone F, Zone E, and Zone C

    • China (Heyuan): Zone A and Zone B

    • China (Zhangjiakou): Zone A

    • China (Beijing): Zone K, Zone L, Zone H, and Zone I

    • China (Ulanqab): Zone B and Zone C

    • China (Chengdu): Zone A and Zone B

    • Singapore: Zone B, Zone A, and Zone C

    Click to view supported regions and zones

    • China (Hangzhou): Zone H and Zone G

    • China (Shanghai): Zone G, Zone F, and Zone E

    • China (Shenzhen): Zone D

    • China (Hohhot): Zone A and Zone B

    • China (Zhangjiakou): Zone B and Zone C

    • China (Beijing): Zone J, Zone G, and Zone F

    • China (Qingdao): Zone C and Zone B

    Click to view supported regions and zones

    • China (Hangzhou): Zone I, Zone J, and Zone K

    • China (Chengdu): Zone A

    • China (Shanghai): Zone B and Zone M

    • China (Shenzhen): Zone F and Zone E

    • China (Heyuan): Zone A and Zone B

    • China (Zhangjiakou): Zone A

    • China (Beijing): Zone K, Zone L, Zone H, and Zone I

    • Singapore: Zone B, Zone A, and Zone C

    Click to view supported regions and zones

    • China (Hangzhou): Zone H and Zone G

    • China (Chengdu): Zone B

    • China (Shanghai): Zone L, Zone G, Zone F, and Zone E

    • China (Shenzhen): Zone D

    • China (Ulanqab): Ulanqab Zone B, Ulanqab Zone B, Ulanqab Zone C

    • China (Hohhot): Zone A and Zone B

    • China (Zhangjiakou): Zone B and Zone C

    • China (Beijing): Zone J, Zone G, and Zone F

    • China (Qingdao): Zone C and Zone B

    Throughput

    min{0.1 × storage capacity (GiB), 30,000} MB/s

    min{0.1 × storage capacity (GiB), 20,000} MB/s

    min{0.2 × storage capacity (GiB), 45,000} MB/s

    Throughput can be increased up to 100,000 MB/s. To request a higher throughput, submit a ticket.

    min{0.2 × storage capacity (GiB), 20,000} MB/s

    Throughput can be increased up to 100,000 MB/s. To request a higher throughput, submit a ticket.

    IOPS

    min{15 × storage capacity (GiB), 3,600,000}

    min{15 × storage capacity (GiB), 2,800,000}

    min{30 × storage capacity (GiB), 7,200,000}

    IOPS can be increased up to 10,000,000. To request a higher IOPS, submit a ticket.

    min{30 × storage capacity (GiB), 2,800,000}

    IOPS can be increased up to 10,000,000. To request a higher IOPS, submit a ticket.

    Average single-stream 4k read latency

    0.6 ms

    0.4 ms

    Average single-stream 4k write latency

    0.8 ms

    0.6 ms

    Before January 22, 2024

    If your file system was created before January 22, 2024, refer to the following performance metrics. To use the upgraded performance, create a new CPFS General-purpose Edition file system and migrate your data to it.

    Metric

    100 MB/s/TiB Baseline

    200 MB/s/TiB Baseline

    File system region

    All supported regions

    All supported regions

    Throughput

    min{0.1 × storage capacity (GiB), 20,000} MB/s

    min{0.2 × storage capacity (GiB), 20,000} MB/s

    Throughput can be increased up to 100,000 MB/s. To request a higher throughput, submit a ticket.

    IOPS

    min{15 × storage capacity (GiB), 2,800,000}

    min{30 × storage capacity (GiB), 2,800,000}

    IOPS can be increased up to 10,000,000. To request a higher IOPS, submit a ticket.

    Average single-stream 4k read latency

    0.6 ms

    0.4 ms

    Average single-stream 4k write latency

    0.8 ms

    0.6 ms

    Metric

    100 MB/s/TiB Baseline

    200 MB/s/TiB Baseline

    File system version number

    v2.3.4 and later

    v2.3.4 and later

    Supported regions

    • China (Hangzhou)

    • China (Shanghai)

    • China (Beijing)

    • China (Hangzhou)

    • China (Shanghai)

    • China (Beijing)

    Throughput

    min{0.1 × storage capacity (GiB), 30,000} MB/s

    min{0.2 × storage capacity (GiB), 45,000} MB/s

    Throughput can be increased up to 100,000 MB/s. To request a higher throughput, submit a ticket.

    IOPS

    min{15 × storage capacity (GiB), 3,600,000}

    min{30 × storage capacity (GiB), 7,200,000}

    IOPS can be increased up to 10,000,000. To request a higher IOPS, submit a ticket.

    Average single-stream 4k read latency

    0.6 ms

    0.4 ms

    Average single-stream 4k write latency

    0.8 ms

    0.6 ms

    CPFS-NFS

    After enabling the file storage CPFS protocol service, you can use a CPFS-NFS client to access a CPFS General-purpose Edition file system. This service provides NFSv3 mount targets that are independent of POSIX mount targets and is available in two types: General-purpose and Cache. The following table compares their performance metrics.

    Protocol service type

    Metric

    100 MB/s/TiB Baseline

    (LRS)

    200 MB/s/TiB Baseline

    (LRS)

    100 MB/s/TiB Baseline

    (ZRS)

    This feature is available only to users on the whitelist.

    General-purpose

    Throughput

    Read/Write: min[100 × storage capacity (TiB), 20,000] MB/s

    Read/Write: min[200 × storage capacity (TiB), 20,000] MB/s

    • Read throughput: min[100 × storage capacity (TiB), 8,750] MB/s

    • Write throughput: min[50 × storage capacity (TiB), 4,375] MB/s

    IOPS

    Read/Write: min[4,000 × storage capacity (TiB), 960,000]

    Read/Write: min[8,000 × storage capacity (TiB), 960,000]

    • Read IOPS: min[4,000 × storage capacity (TiB), 350,000]

    • Write IOPS: min[2,000 × storage capacity (TiB), 175,000]

    Single-stream latency

    • Read latency: 0.8 ms

    • Write latency: 0.8 ms

    • Read latency: 0.6 ms

    • Write latency: 0.6 ms

    • Read latency: 3 to 5 ms

    • Write latency: 3 to 5 ms

    Maximum throughput per client

    600 MB/s

    600 MB/s

    300 MB/s

    Maximum IOPS per client

    • Read: 80,000 IOPS

    • Write: 30,000 IOPS

    • Read: 80,000 IOPS

    • Write: 30,000 IOPS

    • Read: 40,000 IOPS

    • Write: 15,000 IOPS

    Cache

    Throughput

    The maximum read bandwidth specified when creating the protocol service, up to 100 GB/s.

    The maximum read bandwidth specified when creating the protocol service, up to 100 GB/s.

    Not supported

    IOPS

    • Read: min[7,500 × protocol service bandwidth (GB/s), 15,000 × storage capacity (TiB), 1,900,000]

    • Write: min[4,000 × storage capacity (TiB), 960,000]

    • Read: min[7,500 × protocol service bandwidth (GB/s), 30,000 × storage capacity (TiB), 1,900,000]

    • Write: min[8,000 × storage capacity (TiB), 960,000]

    Not supported

    Single-stream latency

    • Read latency (cache hit): 0.2 ms

    • Read latency (cache miss): 0.8 ms

    • Write latency: 0.8 ms

    • Read latency (cache hit): 0.2 ms

    • Read latency (cache miss): 0.6 ms

    • Write latency: 0.6 ms

    Not supported

    Maximum throughput per client

    1.1 GB/s

    1.1 GB/s

    Not supported

    Maximum IOPS per client

    • Read: 90,000 IOPS

    • Write: 40,000 IOPS

    • Read: 90,000 IOPS

    • Write: 40,000 IOPS

    Not supported

    Dataflow performance

    Dataflow is not supported on CPFS file systems that use zone-redundant storage.

    CPFS General-purpose Edition supports dataflow between the file system and Object Storage Service (OSS). After creating a dataflow task, the file system automatically synchronizes object metadata from an OSS bucket. Once synchronized, you can use the high-performance, POSIX-compatible file interface to process the data in OSS. Data can also be exported from the file system to the OSS bucket through the console or OpenAPI.

    Operation type

    Metric

    Description

    Data import

    Throughput for files larger than 1 GB

    • Single-file import throughput: 200 MB/s.

    • Multi-file import throughput can reach the configured bandwidth.

    OPS for megabyte-scale files

    Single-directory and multi-directory import: 1,000.

    Data export

    Throughput for files larger than 1 GB

    • Single-file export throughput: 200 MB/s.

    • Multi-file export throughput can reach the configured bandwidth.

    OPS for megabyte-scale files

    Single-directory and multi-directory export: 600.

    Data deletion

    OPS

    Single-directory and multi-directory deletion: 2,000.

    On-demand loading (lazy load)

    Throughput for files larger than 1 GB

    • Single-file import throughput: 200 MB/s.

    • Multi-file import throughput can reach the configured bandwidth.

    OPS for megabyte-scale files

    Single-directory and multi-directory import: 1,000.

    Automatic metadata update

    OPS

    • Dataflow at 600 MB/s: 2,000.

    • Dataflow at 1,200 MB/s: 3,000.

    • Dataflow at 1,500 MB/s: 4,000.

    Capacity specifications

    Locally redundant storage (LRS)

    • Initial capacity: 3,600 GiB

    • Scaling step size: 1,200 GiB

    • Maximum capacity: 1 PiB

    Zone-redundant storage (ZRS)

    • Initial capacity: 500 GiB

    • Scaling step size: 100 GiB

    • Maximum capacity: 89,600 GiB (approximately 88 TiB)

    Supported advanced features