Introduction to CTERA Edge Filer Version 7.5.x
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Introduction to CTERA Edge Filer Version 7.5.x

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Article Summary

CTERA Edge Filer version 7.5.2820.3 includes the following new features:

Business Continuity After a CTERA Edge Filer Fails

Business continuity is an organization's ability to ensure operations and core business functions are not severely impacted by a disaster or unplanned incident that take critical systems offline. Being able to recover from a disaster is categorized by two factors: Recovery Time Objective (RTO) and Recovery Point Objective (RPO). RTO is the maximum time allowed to get the systems back online and RPO is the maximum amount of data loss that can be suffered.

If an CTERA Edge Filer fails, after setting up a replacement, the metadata from the CTERA Portal can be downloaded quickly so that the stub files are almost immediately available on the replacement CTERA Edge Filer.

See Enabling Fast Disaster Recovery.

For a more thorough overview of BC/DR, see CTERA BC/DR and Ransomware Solutions.

Deduplication on Edge Filers

CTERA edge filers support file-level deduplication that reduces physical cache storage and improves performance when accessing stub files that already exists as another file on the edge filer.

Files with the same content are linked to the same on-disk data, instead of taking twice the disk space. A deduped file, upon being modified, is populated with the underlying data.

See Managing Local Deduplication.

Support for Access to Storage Behind a Proxy Server

Direct uploading and downloading to and from storage works even if the CTERA Portal is behind a proxy server.

See Proxy Settings in the CTERA Portal documentation.

Sync Monitoring

Sync monitoring has now been included in the Cloud Drive page within the edge filer user interface.

See Monitor a Caching Gateway.

Improved Eviction Management

To help manage caching you can set the high and low watermarks for when files are automatically evicted from the edge filer cache and, when required override the settings to manually evict files to reduce the cache storage utilization.

See Managing File Eviction From the Cache.

You can evict individual folder and subfolder content from the edge filer cache in the Files view. See Navigating the CTERA Edge Filer User Interface.

The eviction process has been improved. When eviction starts, the file scanning to determine which files to evict is much faster, so files quickly start to be evicted, immediately freeing up space.

Automatically Sending a Crash Report to CTERA Support

To improve response time from CTERA Support after a crash, if you want, crash reports can be automatically sent to CTERA support.

See Automatically Sending Reports to Support.

Local Quota Enforcement

Local quotas are assigned per cloud drive folder on the portal and enforced on all the edge filers accessing the folder. When a file is added to the folder on the edge filer, and the folder quota has been exceeded, an error is displayed and the file is not added to the folder.


Enforcing cloud folder quotas on edge filers requires defining the folder quota on the CTERA Portal and defining the CTERA Messaging Service on the CTERA Portal.

Local quota enforcement requires a CTERA Portal version higher than 7.5.1159.14.

To enable this feature for subfolders, contact CTERA Support.

Improved Browsing

Browsing files using the SMB protocol has been improved.

Improved Streaming

Streaming files has been improved, including improved streaming with Adobe Creative Suite. Streaming now works directly from the storage bucket for storage nodes defined in the CTERA Portal with Direct Mode.

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