DEE-1421 · Question #27
Case Study 4 A company is experiencing a noticeable decrease in performance when accessing data on their Dell EMC Isilon cluster. The cluster hosts Microsoft Windows home directories and general…
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Question
Case Study 4 A company is experiencing a noticeable decrease in performance when accessing data on their Dell EMC Isilon cluster. The cluster hosts Microsoft Windows home directories and general purpose file shares. In addition, a file pool policy moves data that has not been modified in six months to an achieve tier. The administrator wants your assistance in understanding the reason for the slow data access. The number of users accessing the cluster has not changed. The administrator has shared the following baseline metrics. The outputs were captured from a performance- acceptable time frame. Trace route shows:
-3 hops between clients and the cluster -Average latency is 3 ms Iperf shows:
-940 Mb/s average bandwidth -005 ms average jitter Netstat on the local network shows:
-05% average re-transmission rate Hostcache list:
-20 ms average roundtrip time across all clients The administrator shows you the details of the hostcahce.list output. The output indicates that the top clients on the list have an average of 242 ms round trip time. Based on the output, what information should be provided to the administrator?
Options
- AAn increase in the average round trip time indicates a network problem.
- BOnly the aggregate of all average round trip times will indicate an issue.
- CAn average round trip time less than 300 ms is in the acceptable range.
- DRecalculate and re-populate round trip times by using isi_cbind clear command.
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