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Automatic index updates: Indexes are updated automatically when files in the corresponding folders are modified, even when DocFetcher isn't running. This is done via a daemon that waits in the background and watches all indexed folders. The daemon has very low CPU usage, because, rather than indexing files itself, it only remembers which indexes need to be updated the next time DocFetcher is launched.
A portable version: Runs on both Windows and Linux. You can put all your documents in it and then freely move the entire folder around (i.e., DocFetcher + indexes + documents). Possible destinations include other computers, encrypted volumes (TrueCrypt), CD-ROMs and USB drives. The portable version can also be used for sharing an indexed document repository across a local area network, or across the OS'ses of a Windows/Linux dual boot system.
Detection of HTML pairs, e.g. "foo.htm" and a folder named "foo_files". Each pair will be treated as a single document. This feature may seem rather useless on first sight, but it turned out that this dramatically increases the quality of the search results when you're searching for HTML files, since all the "clutter" inside the HTML folders disappears from the results.
Search in source code files: The file extensions by which DocFetcher recognizes plain text and HTML files can be fully customized. Therefore you can use DocFetcher to search in any kind of source code.
Unicode support: DocFetcher comes with rock-solid Unicode support for MS Office, OpenOffice.org, PDF and HTML files. There's no Unicode support for plain text, RTF and CHM yet, but we're working on that.

search document desktop openSource

Ceph is a distributed network storage and file system designed to provide excellent performance, reliability, and scalability. Ceph is based on a reliable and scalable distributed object store, with a distributed metadata management cluster layered on top to provide a distributed file system with POSIX semantics. There are a variety of ways to interact with the system:
Distributed file system. An dynamic cluster of metadata servers create and manage and file system hierarchy, providing POSIX file system access via the Ceph file system client in recent Linux kernels or via a FUSE driver.
Object storage. A librados library provides applications direct access to the underlying distributed object store. Clients talk directly with storage nodes to store named blobs of data and attributes, while the cluster transparently handles replication and recovery internally.
S3-compatible storage. A radosgw proxy server provides an S3-compatible REST interface to the distributed object storage system, allowing applications designed to work with Amazon’s S3 service to use a private installation of Ceph instead.
Rados block device (RBD). The RBD driver provides a shared network block device via a Linux kernel block device driver (2.6.37+) or a Qemu/KVM storage driver based on librados. In contrast to alternatives like iSCSI or AoE, RBD images are striped and replicated across the Ceph object storage cluster, providing reliable, scalable, and thinly provisioned access to block storage. RBD supports read-only snapshots with rollback.

storage distributed linux cluster opensource networking