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--- title: Blob index and metadata tags description: Learn about blob index and metadata tags in Edge Volumes. author: sethmanheim ms.author: sethm ms.topic: how-to ms.custom: linux-related-content ms.date: 07/18/2025 # Customer intent: As a cloud storage administrator, I want to generate blob index and metadata tags using extended attributes, so that I can effectively categorize and manage my files within Cloud Ingest Edge Volumes. --- # Blob index and metadata tags Cloud Ingest Edge Volumes now supports the ability to generate blob index tags and blob metadata tags directly from Azure Container Storage enabled by Azure Arc. This process involves incorporating extended attributes to the files within your Cloud Ingest Edge Volume, where Edge Volumes translates that into your selected index or metadata tag. ## Blob index tags To generate a blob index tag, create an extended attribute using the prefix `azindex`, followed by the desired key and its corresponding value for the index tag. Edge Volumes then propagates these values to the blob, appearing as the key matching the value. > [!NOTE] > Index tags aren't supported for hierarchical namespace (HNS) accounts. ### Example 1: index tags The following example creates the blob index tag `location=chicagoplant2` on `logfile1`: ```bash $ attr -s azindex.location -V chicagoplant2 logfile1 Attribute "azindex.location" set to a 13 byte value for logfile1: chicagoplant2 ``` ### Example 2: index tags The following example creates the blob index tag `datecreated=1705523841` on `logfile2`: ```bash $ attr -s azindex.datecreated -V $(date +%s) logfile2 Attribute " azindex.datecreated " set to a 10 byte value for logfile2: 1705523841 ``` ## Blob metadata tags To generate a blob metadata tag, create an extended attribute using the prefix `azmeta`, followed by the desired key and its corresponding value for the metadata tag. Edge Volumes then propagates these values to the blob, appearing as the key matching the value. > [!NOTE] > Metadata tags are supported for HNS and non-HNS accounts. > [!NOTE] > HNS blobs also receive `x-ms-meta-is_adls=true` to indicate that the blob was created with Data Lake APIs. ### Example 1: metadata tags The following example creates the blob metadata tag `x-ms-meta-location=chicagoplant2` on `logfile1`: ```bash $ attr -s azmeta.location -V chicagoplant2 logfile1 Attribute "azmeta.location" set to a 13 byte value for logfile1: chicagoplant2 ``` ### Example 2: metadata tags The following example creates the blob metadata tag `x-ms-meta-datecreated=1705523841` on `logfile2`: ```bash $ attr -s azmeta.datecreated -V $(date +%s) logfile2 Attribute " azmeta.datecreated " set to a 10 byte value for logfile2: 1705523841 ``` ## Next steps [What is Azure Container Storage enabled by Azure Arc?](overview.md)