Sun System Handbook - ISO 3.4 June 2011 Internal/Partner Edition | |||
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Solution Type Technical Instruction Sure Solution 1002058.1 : Sun Ultra/Enterprise[TM] Servers: Avoiding Bottlenecks on SBUS I/O Boards
PreviouslyPublishedAs 202897 Description This document tells you how to avoid I/O bottlenecks in the Enterprise 3x00-6500 systems to prevent poor performance in I/O. Steps to Follow When installing SBUS cards in an Enterprise server, you must load balance for throughput. The layout on the SBUS I/O board has two SYSIO channels with a maximum throughput of 120Mbyte. SYSIO-0 is the through point for SBUS SLOT 1, 2 and the onboard Fiber controller. SYSIO-1 is the through point for SBUS 0, onboard SCSI and the onboard network port. The bandwidth for each SYSIO chip is 120Mbyte each, which is important to understand when installing cards. You will want to load balance your installation for throughput. For example, if you are using the onboard fiber ports and want to install a SBUS Fiber card, install the card in SBUS slot 0 to avoid contention with the onboard fiber. Each SBUS has a maximum throughput of 100Mbyte ((25MHz * 32bit)/8); 25MHz is the bus frequency, 32 bit is the SBUS bus, and then dividing by 8 to convert to bytes. The channel to the SYSIO is 120Mbyte, so if each card can supply 100Mbyte the bus can saturate quickly. You will notice a degradation in performance during peak usage, backups, or with online transactions, which rely heavily on the database through the controllers. Backpanel and Connectors Refer to Figure 1. Product Sun Enterprise 4000 Server Sun Enterprise 3000 Server Sun Enterprise 3500 Server Sun Enterprise 6500 Server Sun Enterprise 5500 Server Sun Enterprise 4500 Server Internal Comments Place Sun Internal-Use Only content here. This content will be published to internal SunSolve only. Previously Published As 75083 Change History Date: 2007-05-09 User Name: T209852 Action: Approved Comment: Moved 1 text image as attachment in preparation for IBIS migration. Version: 3 Product_uuid 29ba62b0-0a18-11d6-8988-8f3c2795672c|Sun Enterprise 4000 Server 29b0cfe8-0a18-11d6-94a5-e63f070c91a4|Sun Enterprise 3000 Server 29b720d2-0a18-11d6-9865-e60ab6457390|Sun Enterprise 3500 Server 29ccbffa-0a18-11d6-944e-9f2643ef1cd7|Sun Enterprise 6500 Server 29c606ce-0a18-11d6-98c8-de563f7f1f97|Sun Enterprise 5500 Server 29bdb91a-0a18-11d6-9d2c-c8c4d893e741|Sun Enterprise 4500 Server Attachments This solution has no attachment |
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