I have question about ZFS feature anyone have knowledge in ZFS please ...
1. I try to understand about RAID-Z in ZFS but i can't . Anybody can tell me about architecture or this raid technology conpare with raid-5 or raid-6. i don't know why it can tell " full stripe write "
2. In ZFS if i don't specific raid when i create pool , what type o RIAD that should be. stripe ot concat????
Thank in advance
Ko.
raidz is comparable to raid 5, but with the benefits of ZFS and without the raid 5 "write hole." raidz2 is comparable to raid 6. If you don't specify a type of raid when creating a pool I believe (though I'm not sure) it will default to striping across the drives. If that doesn't answer your questions, maybe you could be a bit more clear? Hope that helps.
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HI,
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If the content above which I mentioned is fault, plz point out.
Thank you for reading this contents.Hi,
leave_for wrote:
HI,
I have question about dml mechanism. particularly delete statement
I learned that SQL statements deal with each row. I'm not sure what you mean.
SQL statements deal with sets of rows ; there may be 0, 1, 2, 3 or more rows in the set.
For example, SELECT statement insert each record(1 row) which matched with term of WHERE into record pool.You must mean an INSERT or MERGE statement that includes a query. A plain old SELECT statement doesn't insert anything, or change any table in any way.
Also I find that UPDATE, INSERT statement insert each record into memory and if that is commited, I/O is generated with disk.That's right. All DML involves some I/O. The I/O may be buffered, so that the DML statement might finish before any disk I/O is actually performed.
if so, Do DELETE statements deal with each row which is matched with terms WHERE statements? ortherwise with rownum?
I hope that I know the mechanism of DELETE statement?Sorry; the last couple of lines you wrote are especially confusing.
When you have a DELETE statement that includes a WHERE clause, such as
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Have questions about your Creative Cloud or Subscription Membership?
You can find answers to several questions regarding membership to our subscription services. Please see Membership troubleshooting | Creative Cloud - http://helpx.adobe.com/x-productkb/policy-pricing/membership-subscription-troubleshooting- creative-cloud.html for additional information. You can find information on such topics as:
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View Solution.that sucks, I accidently pushed "Solved" the issue isn't fully solved. I tried everything, i am a computer tech myself, tried hp chat, i have tried for 3 days, i have tried in the device manager, i tried in services, i tried in wireless assistant. BUT i think i know the solution
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Edited by: Jordi Bosch on Apr 6, 2012 12:27 AM
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