Cloud Storage File System

Accessing Cloud Storage outside your web browser or a 3rd party tool has always been a big challenge. Up to this point there has not been a cost-effective yet comprehensive solution with native NFS or Windows (CIFS or SMB), SFTP, iSCSI or other storage protocols that allow native connectivity to Cloud Storage Providers. BridgeSTOR remedies this with their own file system called CSFS (Cloud Storage File System). CSFS is a file system that runs in the Linux kernel and converts files to Cloud Objects. Numerous sophisticated features were developed to allow for efficient transfer of files into the cloud.


CSFS is a Linux File system available on Centos, Red Hat and SUSE which translates POSIX file system calls to REST object-based calls for Cloud Storage. REST was originally developed for Amazon S3 Cloud Storage and is rapidly becoming a de-facto standard in both the Cloud Storage and Object Storage Vendors. CSFS back-end technology communicates to Cloud Storage Providers over a REST interface. For example, standard file system calls to create, read, write, delete files are translated to GET and PUT REST calls.

CSFS resides 100% in the Linux kernel and does not FUSE which allows CSFS to includes an advanced accelerated I/O path. Most file systems today still use single threaded I/O, which limits access to and from the disk. CSFS solves this issue by adding Asynchronous Processing to the Linux environment. As your data is being processed, CSFS will consolidate your storage into large blocks. As these large blocks are completed, they will be sent off to Cloud Storage in the background. This caching replaces the local Linux buffer cache and greatly enhances access speeds. When link speeds permit, single file writes can easily be done at 500 MB/sec or more over Windows and NFS.

A Global Name Space has been on many IT Professionals wish list for a number of years. CSFS now allows customers to create a Global File View for all of their Cloud Storage Objects. This is done by CSFS separating file system metadata from the physical data while keeping the two combined as a single object. Global view caching is typically maintained in separate local clustered VM environment, BridgeSTOR using the resiliency of Cloud Storage to maintain it’s metadata. In this way, CSFS exposes all files and directories locally for a quick view of the files without accessing the actual Objects.

Data compression re-encodes data so that it occupies less physical storage space. Data compression algorithms search for repeatable patterns of binary 0s and 1s within data structures and replace them with patterns that are shorter in length. The more repeatable patterns found by the compression algorithm, the more the data is compressed.

Encryption takes the bits and then scrambles them up so that it may not be recovered when stored in the cloud. Both of these technologies are native but optional to CSFS which allows for advanced storage functionality in the cloud