![]() ![]() "dt cp", "dt rm" will handle files directly on the server.Īpple AFP / Xsan file systems have no Desktop database which results in long find sequences. Manage files and folders always remotely via AFP / SMB servers by HELIOS. Use HELIOS file services only to ensure consistent file names. HFS and Xsan store umlauts and special characters with a different encoding. Xsan is case-sensitive like UFS file systems, e.g. For server solutions each Xserve must share an exclusive folder per Xserve only, otherwise customers will run into serious problems such as damaged files or seeing a different file content depending upon which Xserve accesses the files. ![]() #APPLE XSAN MOVIE#For some custom applications like an Xsan based movie editing application which is directly working as an Xsan node and using special Xsan APIs to flush the data, they may share the same files. There is a way to flush data but we do not have control over the applications (like InDesign, QuarkXPress, Photoshop, web servers, databases, file and print servers, asset management). This means you cannot share the same data/folders with multiple Xserves because each Xserve may see data from its local cache and not the data the second or third Xserve has just written. We learned from Apple that every front end Xserve is doing its own read and write disk caching unless an application calls a special file sync for each write and read call. Tests with UNIX tools and QuarkXPress revealed that a file may show different content when viewed from different servers In general, this setup is not appropriate for typical file server usageįile and record locking concurrent access damages files This configuration is only suitable for applications that are specifically written to be compatible (e.g. Multiple Xserve serve the same HELIOS volume Saving existing file failed (Can lead to data loss!)Įach Xserve serves a different HELIOS volume The HELIOS File Server bundle enhances Xsan systems, and brings fully integrated cross-platform networking to Mac, Windows, and Web users. #APPLE XSAN FULL#The HELIOS UNIX desktop utilities (mv, rm, cp, ls.) properly handle file copies, etc., directly on the server by preserving the Macintosh specific resource and Windows file streams information, preventing data loss and assuring full cross-platform compatibility. #APPLE XSAN MAC OS X#The HELIOS advanced printing system brings high-end print server features and reliability, while HELIOS adds remote server administration for Windows, Mac OS X and UNIX / Linux users. The HELIOS built-in server fail safety ensures that if one or more processes fail, all other running users are not affected. This is more than 1000 times faster than the Apple AFP Server using the same Xsan volume. HELIOS EtherShare server-based find file will find any file on an Xsan volume within seconds. HELIOS server solutions bring many reliability and performance benefits to Xsan. TCP vs UDP - TCP: reliable, ordered, heavyweight, streaming UDP - unreliable, not ordered, lightweight, datagrams.HELIOS fully supports the Apple Xsan file system with all HELIOS server products. the Domain Name System (DNS), the Routing Information Protocol (RIP), the Dynamic Host Configuration Protocol (DHCP), the Simple Network Management Protocol (SNMP). ![]() UDP (User Datagram Protocol) is a minimal message-oriented Transport Layer protocol (protocol is documented in IETF RFC 768).Īpplication examples that often use UDP: voice over IP (VoIP), streaming media and real-time multiplayer games. UDP on port 311 thinks that error checking and correction is not necessary or performed in the application, avoiding the overhead of such processing at the network interface level. UDP on port 311 provides an unreliable service and datagrams may arrive duplicated, out of order, or missing without notice. UDP port 311 would not have guaranteed communication as TCP. Guaranteed communication over TCP port 311 is the main difference between TCP and UDP. Only when a connection is set up user's data can be sent bi-directionally over the connection.Īttention! TCP guarantees delivery of data packets on port 311 in the same order in which they were sent. TCP is a connection-oriented protocol, it requires handshaking to set up end-to-end communications. TCP is one of the main protocols in TCP/IP networks. TCP port 311 uses the Transmission Control Protocol. ![]()
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