Can Different Engine IP Addresses Be Used to Read and Write the Same Shared File Concurrently?

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Yes, they can.

When different IP addresses are used to write the same shared file, only one IP address can write it successfully limited by the lock mechanism.

Other related questions:
Different methods used by OceanStor 9000 to read and write large-scale small files and large files
Reading/writing large-scale small files and reading/writing large files are significantly different service models. OceanStor 9000 needs to have good I/O capabilities to read and write large-scale small files. These files have small sizes and large scales and therefore require low bandwidth usage which is not an important indicator for evaluating OceanStor 9000. However, OceanStor 9000 needs to have good bandwidth usage and absolute bandwidth to read and write large files which have larger sizes and smaller scales than small files. In most cases, proof of concept (POC) or performance acceptance tests set requirements for the average read and write bandwidth and the maximum read and write bandwidth of OceanStor 9000.

How many types of IP address are used in the file engine?
Three types of IP address are used in the file engine, namely, physical IP addresses, virtual IP addresses, and console IP addresses.

Can SNMP read and write community names be configured the same on a CE switch
SNMP read and write community names cannot be the same on a CE switch. Otherwise, the latest configuration will overwrite the previous one.

Method used to locate LUNs with poor read and write performance
Method used to locate LUNs with poor read and write performance: 1. The LUN write policy is write through. Locate the cause why the LUN write policy is write through. 2. If the host interface is iSCSI, check whether the network rate is 1 Gbit/s, whether the network is stable, and whether ping packets are lost. If the Fibre Channel or SAS network is used, log in to the storage's OSM page to check whether an alarm indicating that the front end encounters continuous error codes is reported. 3. Check whether slow disks exist in RAID groups. Specifically, run iostat -x 1 to check whether some disks differ from other disks (the util value of one or two disks is greater than that of other disks and reaches 100. If the util value of all disks in the RAID group reaches about 100, the configurations are incorrect and back-end disks are slow disks). If slow disks exist, replace them. 4. If a file system exists on the host, the file system produces enormous fragments when the disk space utilization rate exceeds 90%, causing the deterioration of read/write performance. You are advised to use disk space correctly.

Accessing file sharing services of OceanStor 9000 using an IP address
You can use the dynamic front-end IP address or static front-end IP address of an OceanStor 9000 node to access file sharing services. However, service performance and reliability delivered by InfoEqualizer cannot be improved when this access method is used. Therefore, you are advised to use domain names to access file sharing services.

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