[[["容易理解","easyToUnderstand","thumb-up"],["確實解決了我的問題","solvedMyProblem","thumb-up"],["其他","otherUp","thumb-up"]],[["難以理解","hardToUnderstand","thumb-down"],["資訊或程式碼範例有誤","incorrectInformationOrSampleCode","thumb-down"],["缺少我需要的資訊/範例","missingTheInformationSamplesINeed","thumb-down"],["翻譯問題","translationIssue","thumb-down"],["其他","otherDown","thumb-down"]],["上次更新時間:2025-09-04 (世界標準時間)。"],[],[],null,["# Storage options overview\n\n\u003cbr /\u003e\n\nMySQL \\| [PostgreSQL](/sql/docs/postgres/storage-options-overview \"View this page for the PostgreSQL database engine\") \\| [SQL Server](/sql/docs/sqlserver/storage-options-overview \"View this page for the SQL Server database engine\")\n\n\u003cbr /\u003e\n\nThis page describes the different storage types available for your\nCloud SQL instances.\n\nCloud SQL offers different storage type options depending on the\nCloud SQL edition and the machine series you select for your instance:\n\n- **Hyperdisk Balanced** (Preview): a Google Cloud Hyperdisk offering that offers scalable, high-performance storage service. This storage type is only available for the C4A machine series.\n\n\u003c!-- --\u003e\n\n- **Performance Persistent Disk (SSD)**: a persistent disk offering for high-performance databases and is backed by solid-state drives. This storage type is available for the Cloud SQL Enterprise edition machine series, and the Cloud SQL Enterprise Plus edition N2 machine series.\n\nFor more information about the different machine series and types available\nfor Cloud SQL, see\n[Machine series overview](/sql/docs/mysql/machine-series-overview).\n\nGoogle Cloud Hyperdisk Balanced\n-------------------------------\n\n|\n| **Preview\n| --- Hyperdisk Balanced storage**\n|\n|\n| This feature is subject to the \"Pre-GA Offerings Terms\" in the General Service Terms section\n| of the [Service Specific Terms](/terms/service-terms#1).\n|\n| You can process personal data for this feature as outlined in the\n| [Cloud Data Processing\n| Addendum](/terms/data-processing-addendum), subject to the obligations and restrictions described in the agreement under\n| which you access Google Cloud.\n|\n| Pre-GA features are available \"as is\" and might have limited support.\n|\n| For more information, see the\n| [launch stage descriptions](/products#product-launch-stages).\n\nCloud SQL uses the Hyperdisk Balanced storage option for its\n[C4A machine series](/sql/docs/mysql/machine-series-overview#c4a).\nThis storage type is a Google Cloud Hyperdisk offering. Hyperdisk is the\nnewest generation of network block storage service. It offers\nscalable, high-performance storage service with a comprehensive suite\nof data persistence and management capabilities. Hyperdisk Balanced provides\ncustomizable throughput and IOPS. For more\ninformation, see [About Hyperdisk Balanced](/compute/docs/disks/hd-types/hyperdisk-balanced).\n\n### Default values and limits\n\nDefault values and limits for IOPS and throughput for Hyperdisk Balanced are\nset based on your instance's configuration, specifically the machine type and\nstorage capacity. The selected storage capacity limits the default value and\nthe machine type sets the maximum value for both IOPS and throughput. You can\nmodify these values for your instance at any time.\n\nThe following table shows the minimum and maximum limits for IOPS and throughput\nfor each machine type in the\n[C4A machine series](/sql/docs/mysql/machine-series-overview) based on\nits vCPUs:\n\nThe following table shows the default Google Cloud Hyperdisk Balanced\nIOPS and throughput values based on the selected disk size:\n\nYou can set custom IOPS and throughput levels for your Google Cloud Hyperdisk\nBalanced and Google Cloud Hyperdisk Balanced High Availability volumes. The modified\nvalues must meet the following requirements:\n\n- **IOPS**\n\n - Minimum: 3,000 IOPS\n - Maximum: 500 IOPS per GB disk capacity, for a maximum of 160,000 for Google Cloud Hyperdisk Balanced and a maximum of 100,000 for Google Cloud Hyperdisk Balanced High Availability.\n- **Throughput**\n\n - Minimum: 140 MiB/s\n - Maximum: For Google Cloud Hyperdisk Balanced, the greater of 2,400 MiB/s or the provisioned IOPS divided by 4. For Google Cloud Hyperdisk Balanced High Availability, the greater of 1,200 MiB/s, or the provisioned IOPS divided by 4.\n\n### Hyperdisk Balanced limitations\n\nConsider the following limitations when using Hyperdisk Balanced with your\nCloud SQL instances:\n\n- Hyperdisk Balanced only allows changes to capacity, IOPS, and throughput once every four hours. Data workloads needing more frequent increases might result in extended periods of full storage and might impact performance.\n\nPerformance Persistent Disk\n---------------------------\n\nCloud SQL uses the Performance Persistent Disk (SSD) storage option for\nits N2 machine series. SSD is a\nPersistent Disk volumes offering that provides durable network storage devices and\nis suitable for enterprise applications and high-performance databases that\nrequire lower latency and more IOPS.\nFor more information, see\n[About Persistent Disk](/compute/docs/disks/persistent-disks).\n\nIOPs and throughput for SSD storage type are set based on the machine type\nand storage capacity you set. You can't configure the values for IOPS and\nthroughput.\n\n### N2 SSD IOPS and throughput limits\n\nThe following table shows the maximum values for IOPS and throughput\nfor the SSD storage option based on the number of vCPUs for the\n[N2 machine series](/sql/docs/mysql/machine-series-overview#n2):\n\n| **Note:** To increase the IOPS and throughput values for the N2 machine series, increase the storage capacity of your instance.\n\nWhat's next\n-----------\n\n- [Create an instance](/sql/docs/mysql/create-instance)\n- Learn more about the different [machine series](/sql/docs/mysql/machine-series-overview) available in Cloud SQL."]]