Adaptors needed for Mini & 2 24" CRTs, performance, eventual switch to LCDs
Many questions. Considering getting the Mini, but want to continue to use my two 24" CRT displays for the time being. I'm a little confused about the ports on the mini; will I need an adaptor for one or both displays? When I get some more money together, and switch to LCD screens, will I need any adaptors (or adaptors that are different than any used for the CRTs)?
I'm thinking of getting the 2.0 and upgrading to 4GB RAM. I do book work (mostly text, some photoshop, rarely files over 20MB). I think the 2.0/4GB configuration will run the two monitors, but does anybody think not? And, I notice that some mfrs are selling 26" and 28" monitors. Would two of those work? Would two Apple 30" displays work? Not that I have the money for even one of those. Just curious . . . .
eke,
I just got the mini you are describing...2.0 with 4GB RAM. I haven't beaten it into the ground yet...(had it for only 24 hours) But I can confirm it will run 2 monitors. Up to 1920x1200 on one and possibly 2560x1600 on the other, depending on your connection to the mini-DisplayPort.
It comes with an adapter that will hook up to a DVI monitor. The VGA (is that what your 24" CRT monitors are?) adapters are $29 each and you'd need to get 2 of them. One mini-DisplayPort to VGA and one mini-DVI to VGA. The mini-DisplayPort to DVI is $29 also. For the Dual-Link it's $99.
Unless you're running the new Apple display you'll probably need an adapter when you upgrade still. And to be honest I'm not sure about running 2 of the new Apple Displays with the mini.
-Jay
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hello guys,
in oracle RAC each node must have a minimum of 3 adaptors. one for private interconnect, one for public interconnect and one for serving the user requests (VIP).
1. also in oracle 11g with the introduction of SCAN. do we have to add a new network adaptor to make use of scan or can the network adaptor using the VIP address can be used for SCAN. if SCAN requires a new adaptor then it makes 4 n/w adaptors needed for each node,
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can any one help me understand these concepts please...vishnusivathej wrote:
hello guys,
in oracle RAC each node must have a minimum of 3 adaptors. one for private interconnect, one for public interconnect and one for serving the user requests (VIP).I believe its not correct. There should be two adaptors only. One for the private interconnect, one for the pulbic. The VIP is going to be using the public interconnect only. The third one, is going to be required if you are going to be using it for storage.
>
1. also in oracle 11g with the introduction of SCAN. do we have to add a new network adaptor to make use of scan or can the network adaptor using the VIP address can be used for SCAN. if SCAN requires a new adaptor then it makes 4 n/w adaptors needed for each node,SCAN IP would be separate from the VIP. I am not sure that you need a separate adaptor for it since its also going to be a public IP.
2. Oracle documentation says that SCAN can be resolved to at most 3 network addresses. what happens if we have a RAC with more than 3 nodes.There is no mandatory thing that you need 3 SCAN network addresses. One can be used as well. 3 is the suggested setting for the setup. I believe for nodes more than 3 too, this would work. I have not installed 11.2 RAC for more than 3 nodes yet so can't be sure .
3. How does this SCAN really work. it says that scan be used as a single IP address instead of defining several ip address in the tnsnames.ora file at the client side.That's wrong. There is nothing like single IP address.SCAN is Single Cluster Access Name which means instead of putting VIPs in the client side tnsnames.ora, you are going to put just a SCAN cluster name whose VIP address resolutio is going to be done with the help of your DNS . Please read the documentation which explains the concept in lot more detail.
4. moreover the these SCAN ip Addresses are assigned by the DNS. i dont understand how can more than 2 system share a same ip address.Not sure that I got your statement.
HTH
Aman.... -
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XMLAGG structure, performance help needed for odd nesting in schema
Hello,
I have to produce XML to look like:
<?xml version='1.0'?>
<enterprise>
<membership>
<sourcedid>
<id>PHYS_101_001_FA2007</id>
</sourcedid>
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<member>
<sourcedid>
<id>D2LU0001</id>
</sourcedid>
<role roletype="Sample Role">
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</role>
</member>
<member>
<sourcedid>
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</sourcedid>
<role roletype="Sample Role">
<status>1</status>
</role>
</member>
</membership>
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I have a query which does produce that output (except for the roletype attribute), but its performance is horrible; it takes about 40 minutes to return data:
SELECT
XMLROOT(
XMLELEMENT("enterprise",
XMLAGG(
XMLELEMENT("membership",
XMLFOREST( XMLELEMENT("id",cx.mapped_course_id) as "sourcedid"
(SELECT XMLAGG(
XMLELEMENT("member",
XMLFOREST(XMLELEMENT("id",spriden_id) AS "sourcedid",
XMLELEMENT("status",'1') AS "role"
FROM enrollments_fall_sfrstca efs
, spriden sp
, gzv_tuid t
WHERE sp.spriden_change_ind IS NULL
AND sp.spriden_pidm = t.pidm
AND t.tuid = efs.user_name
AND efs.mapped_course_id = cx.mapped_course_id
AND efs.term = cx.semester
, VERSION '1.0', STANDALONE NO VALUE)
FROM courses_xt cx
WHERE cx.semester = :term_code
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courses_xt:
MAPPED_COURSE_ID SEMEST
AVFT209-13307-201210 201210
AVFT210-13308-201210 201210enrollments_fall_sfrstca:
MAPPED_COURSE_ID USER_NAME
AVFT209-13307-201210 FULLERC8
AVFT209-13307-201210 SHUPEK
AVFT209-13307-201210 NOMAN
AVFT210-13308-201210 SHUPEK
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Please advise!
Thanks,
Anita LeesHi Anita,
Have you tried with a GROUP BY and no subquery?
Here's an example using SCOTT schema.
I've used the same tag names and structure so that you can see the analogy :
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XMLAgg(
XMLElement("membership",
XMLElement("sourceid", xmlelement("id", d.deptno))
, XMLAgg(
XMLElement("member",
XMLElement("sourceid",
XMLElement("id", e.empno)
, XMLElement("role",
XMLAttributes(e.job as "roletype")
, XMLElement("status", '1')
FROM scott.dept d
LEFT OUTER JOIN scott.emp e ON e.deptno = d.deptno
WHERE d.deptno IN (10,20)
GROUP BY d.deptno
;which gives :
<enterprise>
<membership>
<sourceid>
<id>10</id>
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<member>
<sourceid>
<id>7782</id>
</sourceid>
<role roletype="MANAGER">
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</member>
<member>
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</sourceid>
<role roletype="CLERK">
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<sourceid>
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</sourceid>
<role roletype="PRESIDENT">
<status>1</status>
</role>
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<sourceid>
<id>20</id>
</sourceid>
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<role roletype="CLERK">
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Switchingfrom PC to Mac mini, enough power to perform tasks?
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ps operating system is Mac OS X , don't know about the (10.7.2) .I have both the new Mini Core i5 and my existing Gateway Core 2 Quad PC; both running 64 bit OS. If you're running 32bit OS on a PC, only the first 4Gb is recognized and utilized. The Mini is Lion, the PC is running Vista 64 and I do digital media stuff both for a living and also for fun. First things first..
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