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OSDOCS-18425# Add hyperdisk-balanced high availability support #107213

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OSDOCS-18425# Add hyperdisk-balanced high availability support #107213

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22 changes: 22 additions & 0 deletions modules/persistent-storage-csi-gcp-hyperdisk-ha-overview.adoc
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// Module included in the following assemblies:
//
// * storage/container_storage_interface/persistent-storage-csi-gcp-pd.adoc

:_mod-docs-content-type: CONCEPT
[id="persistent-storage-csi-gcp-hyperdisk-ha-overview_{context}"]
= Hyperdisk-balanced high availability disks overview
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[role="_abstract"]
{product-title} supports Hyperdisk Balanced High Availability volumes.

Hyperdisk Balanced High Availability volumes are useful for:

* Protecting your applications from a zonal outage by synchronously replicating data across two zones in the same region

* When you require write access to the same volume in multiple zones

For a single Hyperdisk Balanced High Availability volume, you can specify up to 100,000 IOPS and 1,200 MiB/s of throughput.
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@gcharot gcharot Apr 27, 2026

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Why are we saying 1,200MiB/s while https://docs.cloud.google.com/compute/docs/disks/hd-types/hyperdisk-balanced-ha#size_limits says 2400?


To set up Hyperdisk Balanced High Availability disks, see Section _Setting up hyperdisk-balanced disks_.

For complete limit information, in the _Additional resources_ section, see _Size and performance limits_.
2 changes: 1 addition & 1 deletion modules/persistent-storage-csi-gcp-hyperdisk-storage-pools-procedure.adoc
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Expand Up @@ -155,7 +155,7 @@ allowedTopologies: <7>
----
<1> Specify the name for your storage class. In this example, it is `hyperdisk-sc`.
<2> `pd.csi.storage.gke.io` specifies GCP CSI provisioner.
<3> Specifies using hyperdisk-balanced disks.
<3> Specifies using hyperdisk-balanced disks. To specify high availability hyperdisk-balanced disk, set the value to `hyperdisk-balanced-high-availability`.
<4> Specifies the throughput value in MiBps using the "Mi" qualifier. For example, if your required throughput is 250 MiBps, specify "250Mi". If you do not specify a value, the capacity is based upon the disk type default.
<5> Specifies the IOPS value without any qualifiers. For example, if you require 7,000 IOPS, specify "7000". If you do not specify a value, the capacity is based upon the disk type default.
<6> If using storage pools, specify a list of specific storage pools that you want to use in the format: projects/PROJECT_ID/zones/ZONE/storagePools/STORAGE_POOL_NAME.
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4 changes: 4 additions & 0 deletions storage/container_storage_interface/persistent-storage-csi-gcp-pd.adoc
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Expand Up @@ -42,6 +42,8 @@ include::modules/persistent-storage-csi-gcp-pd-storage-class-ref.adoc[leveloffse

include::modules/persistent-storage-csi-gcp-hyperdisk-limitations.adoc[leveloffset=+2]

include::modules/persistent-storage-csi-gcp-hyperdisk-ha-overview.adoc[leveloffset=+2]

include::modules/persistent-storage-csi-gcp-hyperdisk-storage-pools-overview.adoc[leveloffset=+2]

To set up storage pools, see xref:../../storage/container_storage_interface/persistent-storage-csi-gcp-pd.adoc#persistent-storage-csi-gcp-hyperdisk-storage-pools-procedure_persistent-storage-csi-gcp-pd[Setting up hyperdisk-balanced disks].
Expand All @@ -53,6 +55,8 @@ ifndef::openshift-dedicated[]
[role="_additional-resources"]
=== Additional resources
* xref:../../installing/installing_gcp/installing-gcp-customizations.adoc#installing-gcp-customizations[Installing a cluster on GCP with customizations]

* link:https://docs.cloud.google.com/compute/docs/disks/hd-types/hyperdisk-balanced-ha#size_limits[Size and performance limits]
endif::openshift-dedicated[]

include::modules/persistent-storage-csi-gcp-pd-encrypted-pv.adoc[leveloffset=+1]
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