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  • Amanda Todd–What Parents Can Learn From Her Story

    - by D'Arcy Lussier
    Amanda Todd was a bullied teenager who committed suicide this week. Her story has become headline news due in part to her You Tube video she posted telling her story:   The story is heartbreaking for so many reasons, but I wanted to talk about what we as parents can learn from this. Being the dad to two girls, one that’s 10, I’m very aware of the dangers that the internet holds. When I saw her story, one thing jumped out at me – unmonitored internet access at an early age. My daughter (then 9) came home from a friends place once and asked if she could be in a YouTube video with her friend. Apparently this friend was allowed to do whatever she wanted on the internet, including posting goofy videos. This set off warning bells and we ensured our daughter realized the dangers and that she was not to ever post videos of herself. In looking at Amanda’s story, the access to unmonitored internet time along with just being a young girl and being flattered by an online predator were the key events that ultimately led to her suicide. Yes, the reaction of her classmates and “friends” was horrible as well, I’m not diluting that. But our youth don’t fully understand yet that what they do on the internet today will follow them potentially forever. And the people they meet online aren’t necessarily who they claim to be. So what can we as parents learn from Amanda’s story? Parents Shouldn’t Feel Bad About Being Internet Police Our job as parents is in part to protect our kids and keep them safe, even if they don’t like our measures. This includes monitoring, supervising, and restricting their internet activities. In our house we have a family computer in the living room that the kids can watch videos and surf the web. It’s in plain view of everyone, so you can’t hide what you’re looking at. If our daughter goes to a friend’s place, we ask about what they did and what they played. If the computer comes up, we ask about what they did on it. Luckily our daughter is very up front and honest in telling us things, so we have very open discussions. Parents Need to Be Honest About the Dangers of the Internet I’m sure every generation says that “kids grow up so fast these days”, but in our case the internet really does push our kids to be exposed to things they otherwise wouldn’t experience. One wrong word in a Google search, a click of a link in a spam email, or just general curiosity can expose a child to things they aren’t ready for or should never be exposed to (and I’m not just talking about adult material – have you seen some of the graphic pictures from war zones posted on news sites recently?). Our stance as parents has been to be open about discussing the dangers with our kids before they encounter any content – be proactive instead of reactionary. Part of this is alerting them to the monsters that lurk on the internet as well. As kids explore the world wide web, they’re eventually going to encounter some chat room or some Facebook friend invite or other personal connection with someone. More than ever kids need to be educated on the dangers of engaging with people online and sharing personal information. You can think of it as an evolved discussion that our parents had with us about using the phone: “Don’t say ‘I’m home alone’, don’t say when mom or dad get home, don’t tell them any information, etc.” Parents Need to Talk Self Worth at Home Katie makes the point better than I ever could (one bad word towards the end): Our children need to understand their value beyond what the latest issue of TigerBeat says, or the media who continues flaunting physical attributes over intelligence and character, or a society that puts focus on status and wealth. They also have to realize that just because someone pays you a compliment, that doesn’t mean you should ignore personal boundaries and limits. What does this have to do with the internet? Well, in days past if you wanted to be social you had to go out somewhere. Now you can video chat with any number of people from the comfort of wherever your laptop happens to be – and not just text but full HD video with sound! While innocent children head online in the hopes of meeting cool people, predators with bad intentions are heading online too. As much as we try to monitor their online activity and be honest about the dangers of the internet, the human side of our kids isn’t something we can control. But we can try to influence them to see themselves as not needing to search out the acceptance of complete strangers online. Way easier said than done, but ensuring self-worth is something discussed, encouraged, and celebrated is a step in the right direction. Parental Wake Up Call This post is not a critique of Amanda’s parents. The reality is that cyber bullying/abuse is happening every day, and there are millions of parents that have no clue its happening to their children. Amanda’s story is a wake up call that our children’s online activities may be putting them in danger. My heart goes out to the parents of this girl. As a father of daughters, I can’t imagine what I would do if I found my daughter having to hide in a ditch to avoid a mob or call 911 to report my daughter had attempted suicide by drinking bleach or deal with a child turning to drugs/alcohol/cutting to cope. It would be horrendous if we as parents didn’t re-evaluate our family internet policies in light of this event. And in the end, Amanda’s video was meant to bring attention to her plight and encourage others going through the same thing. We may not be kids, but we can still honour her memory by helping safeguard our children.

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  • Samba: share home directories when home directories are symbolic links

    - by Owen
    I have set up a new Ubuntu 9.10 system for five users. In the system is a large LVM volume where all the data is to be kept. The main system disk is not for this purpose, so I attempted to move the home directories using usermod -d /var/data/username -m And started creating my shares for these new home locations. But then I thought: hey, Samba has built-in home directory sharing! So I enabled that, and it didn't work. The shares were not published to the network. Only the share for user 'owen' was published; his folder hadn't been moved. So I thought: maybe Samba home sharing only works for default home locations, so how about I move the home directories back to where they were, and then make them symlinks. root@boxenmkiv:/home# ls -l total 4 lrwxrwxrwx 1 brett brett 25 2010-04-03 08:48 brett -> /var/data/brett/ lrwxrwxrwx 1 carly carly 23 2010-04-03 08:48 carly -> /var/data/carly/ lrwxrwxrwx 1 dave dave 21 2010-04-03 08:48 dave -> /var/data/dave/ lrwxrwxrwx 1 kate kate 23 2010-04-03 08:47 kate -> /var/data/kate/ drwxr-xr-x 4 owen owen 4096 2010-04-03 08:44 owen Like so. Still no go. The only users share which is published to the network is 'owen' who as you can see above has not had his home directory moved. I have also added the following to my smb.conf [global] follow symlinks = yes wide symlinks = yes unix extensions = no With no luck. Am I going about doing this the entirely wrong way? Should I just give up and manually create shares for the users? Thanks in advance.

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  • ?????3:????“??”

    - by Todd Bao
    ?????SQL???????... =D select c from(select * from(select 'oracle' cc, level no from dual connect by level <= length('oracle'))model return updated rowsdimension by (no)measures (cc c, no n)rules (   c[any] = substr(c[cv()],n[cv()],1)))/ ????itpub?????????oracle????????,???????,?????????“???”,????????????????????????????????????=D ??? Todd ????:http://www.itpub.net/forum.php?mod=viewthread&action=printable&tid=1253982 Todd

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  • MySQL won't start or won't installed

    - by Owen
    Hi there, I'm trying to get a local LAMP setup on my Ubuntu desktop. I'm successfully got PHP install but I'm having trouble with MySQL If PHP tries to connet to MySQL I get this error: Warning: mysql_connect() [function.mysql-connect]: Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2) in /var/www/testing.php on line 3 Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2) If I try via command line I get much the same error: owen@desktop:~$ mysql ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (13) Weirdly "/var/run/mysqld" does not exist. Running a whereis command I get the following: owen@desktop:~$ whereis mysqld.sock mysqld: /usr/sbin/mysqld /usr/share/man/man8/mysqld.8.gz So is MySQL even installed? Well acording to dpkg owen@desktop:~$ dpkg -l | grep mysql ii libapache2-mod-auth-mysql 4.3.9-13ubuntu1 Apache 2 module for MySQL authentication ii libdbd-mysql-perl 4.016-1 Perl5 database interface to the MySQL database ii libmysqlclient15off 5.1.30really5.0.83-0ubuntu3 MySQL database client library ii libmysqlclient16 5.1.49-1ubuntu8.1 MySQL database client library ii mysql-admin 5.0r14+openSUSE-2.1 GUI tool for intuitive MySQL administration ii mysql-client-5.1 5.1.49-1ubuntu8.1 MySQL database client binaries ii mysql-client-core-5.1 5.1.49-1ubuntu8.1 MySQL database core client binaries ii mysql-common 5.1.49-1ubuntu8.1 MySQL database common files, e.g. /etc/mysql/my.cnf ii mysql-gui-tools-common 5.0r14+openSUSE-2.1 Architecture independent files for MySQL GUI Tools ii mysql-query-browser 5.0r14+openSUSE-2.1 Official GUI tool to query MySQL database ii mysql-server 5.1.49-1ubuntu8.1 MySQL database server (metapackage depending on the latest version) ii mysql-server-5.1 5.1.49-1ubuntu8.1 MySQL database server binaries and system database setup ii mysql-server-core-5.0 5.1.30really5.0.83-0ubuntu3 MySQL database core server files ii mysql-server-core-5.1 5.1.49-1ubuntu8.1 MySQL database server binaries ii php5-mysql Can someone please help I'm really confused as what to do next. I'm not a Linux expert at all most of these commands I've ran I found of diffrent blogs and help forums.

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  • ????showPopupBehavior??region??popup??

    - by Todd Bao
    ???????ADF??????????????:?????????showPopupBehavior???jsp?,???????popup????jsp??region(??Bounded Taskflow)????jsff?????????showPopupBehavior?poupId???????????????<af:region value="#{bindings.inner1.regionModel}" id="r1"/><af:commandButton text="Pop UP" id="cb1">  <af:showPopupBehavior popupId="r1:p1"/></af:commandButton>?????popupId - r1:p1 - ?????id?r1?region????id?p1?popup???jsff?id??????????????,expression builder???????,design time checker????popupId????,?????????????????? Todd

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  • Custom Error, 404, 401 pages in SharePoint&hellip;

    - by Shawn Cicoria
    In WSS 3.0/MOSS 2007 we had to resort to things like HttpModules [1] for errors, access denied, or for 404 errors updating the WebApp properties [2] Well, in 2010, thanks to Andrew Connell for pointing this out, Todd Carter blogs about what we now have in SPS 2010 here: http://todd-carter.com/post/2010/04/07/An-Expected-Error-Has-Occurred.aspx    [1] http://blogs.msdn.com/ketaanhs/archive/2009/03/16/moss-sharepoint-2007-custom-error-page-and-access-denied-page.aspx [2] http://blogs.msdn.com/jingmeili/archive/2007/04/08/how-to-create-your-own-custom-404-error-page-and-handle-redirect-in-sharepoint-2007-moss.aspx

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  • SQL Server Installation Checklist

    - by Jonathan Kehayias
    The other night I was asked on Twitter by Todd McDonald (Twitter), for a build list for SQL Server 2005 and 2008.  My initial response was to provide a link to the SQL Server Build List Blog , which documents all of the builds of SQL Server and provides links to the KB articles associated with the builds.  However, this wasn’t what Todd was after, he actually wanted a reference for an installation checklist for SQL Server.  I have a number of these that I use in my job, and they vary...(read more)

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  • Tuxedo Load Balancing

    - by Todd Little
    A question I often receive is how does Tuxedo perform load balancing.  This is often asked by customers that see an imbalance in the number of requests handled by servers offering a specific service. First of all let me say that Tuxedo really does load or request optimization instead of load balancing.  What I mean by that is that Tuxedo doesn't attempt to ensure that all servers offering a specific service get the same number of requests, but instead attempts to ensure that requests are processed in the least amount of time.   Simple round robin "load balancing" can be employed to ensure that all servers for a particular service are given the same number of requests.  But the question I ask is, "to what benefit"?  Instead Tuxedo scans the queues (which may or may not correspond to servers based upon SSSQ - Single Server Single Queue or MSSQ - Multiple Server Single Queue) to determine on which queue a request should be placed.  The scan is always performed in the same order and during the scan if a queue is empty the request is immediately placed on that queue and request routing is done.  However, should all the queues be busy, meaning that requests are currently being processed, Tuxedo chooses the queue with the least amount of "work" queued to it where work is the sum of all the requests queued weighted by their "load" value as defined in the UBBCONFIG file.  What this means is that under light loads, only the first few queues (servers) process all the requests as an empty queue is often found before reaching the end of the scan.  Thus the first few servers in the queue handle most of the requests.  While this sounds non-optimal, in fact it capitalizes on the underlying operating systems and hardware behavior to produce the best possible performance.  Round Robin scheduling would spread the requests across all the available servers and thus require all of them to be in memory, and likely not share much in the way of hardware or memory caches.  Tuxedo's system maximizes the various caches and thus optimizes overall performance.  Hopefully this makes sense and now explains why you may see a few servers handling most of the requests.  Under heavy load, meaning enough load to keep all servers that can handle a request busy, you should see a relatively equal number of requests processed.  Next post I'll try and cover how this applies to servers in a clustered (MP) environment because the load balancing there is a little more complicated. Regards,Todd LittleOracle Tuxedo Chief Architect

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  • SQL??“ALL”,????

    - by Todd Bao
    ALL????????????,>ALL?>=ALL?<ALL?<=ALL?=ALL?!=ALL???????????????????WHERE????TRUE?????????“=ALL”?????:select employee_id,last_name,department_id  from hr.employees   where department_id =ALL (select department_id from hr.employees where salary > 16000);EMPLOYEE_ID + LAST_NAME         + DEPARTMENT_ID----------- + ------------------------- + -------------    100 + King            +         90    101 + Kochhar            +         90    102 + De Haan            +         903 rows selected.??????????SALARY??16000????????????????????(???90),???????????????????????,????????????department_id???,????????????,???16000???8000:select employee_id,last_name   from hr.employees   where department_id =ALL (select department_id from hr.employees where salary > 8000);no rows selected????,ALL???????????????????WHERE????TURE,??????,??????salary > 77777:select employee_id,last_name   from hr.employees   where department_id =ALL (select department_id from hr.employees where salary > 77777)/?????????????77777??,??????“where department_id =ALL (???)”??TRUE,?????????????:EMPLOYEE_ID + LAST_NAME----------- + -------------------------    198 + OConnell    199 + Grant    ...   .....    196 + Walsh    197 + Feeney107 rows selected.?????????????>ALL?<ALL?>=ALL?<=ALL?!=ALL??,??????????????,???????“?”??????????????????,?“?”?????????????????????????????:select * from hr.employees where department_id >=ALL (null)/Todd

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  • JDK7?????

    - by Todd Bao
    ??JSR 334,JDK 7?????????????,???:1. switch????String????:    public static void switchString(String s){        switch (s){        case "db": ...        case "wls": ...        case "idm": ...        case "soa": ...        case "fa": ...        default: ...        }    }2. ?????????? - "0b"???"_"???,?????????? a. ???????????, 0b: ????????????:        byte b1 = 0b00100001;     // New        byte b2 = 0x21;        // Old        byte b3 = 33;        // Old b. ??????????????,?????,????????????:    long phone_nbr = 021_1111_2222;3. ???????????? - "?? new",????????:        ArrayList<String> al1 = new ArrayList<String>();    // Old        ArrayList<String> al2 = new ArrayList<>();        // New4. ????reflect?????????? - ReflectOperationException,????:    ClassNotFoundException,     IllegalAccessException,     InstantiationException,     InvocationTargetException,     NoSuchFieldException,     NoSuchMethodException5. catch????????,?????????,????????:    try{        // code    }    catch (SQLException | IOException ex) {        // ...    }6. ?????? - ??????????,??????????style:    public void test() throws NoSuchMethodException, NoSuchFieldException{    // ??        try{            // code        }        catch (RelectiveOperationException ex){    // ??            throws ex;        }    }7. ???try()?? - Try with Resources,?????????????(???????????java.lang.AutoCloseable??),???????try?????"("??"{":    try(BufferedReader br = new BufferedReader(new FileReader("/home/oracle/temp.txt"))){        ... br.readLine() ...    }try-with-resources?????catch,??????????catch???????Todd

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  • ???? Oracle11g ????????? No.2 - v$database.CURRENT_SCN

    - by Todd Bao
    «????Oracle 11g ???????»???????????,?11.2.0.3.0?????: select current_scn from v$database union all select current_scn from v$database; ??????????SCN,??????11.2.0.1.0???????????SCN?????? ??,????11.2.0.1.0????,11.2.0.3.0????X$KCCDI(V$DATABASE?????,??CURRENT_SCN??)??,?????????SCN? ----------------------------------------------------| Id  | Operation            | Name               |----------------------------------------------------|   0 | SELECT STATEMENT     |                    ||   1 |  MERGE JOIN CARTESIAN|                    ||*  2 |   FIXED TABLE FULL   | X$KCCDI            ||   3 |   BUFFER SORT        |                    ||   4 |    VIEW              | VW_JF_SET$6E0AEE5B ||   5 |     UNION-ALL        |                    ||   6 |      FIXED TABLE FULL| X$KCCDI2           ||   7 |      FIXED TABLE FULL| X$KCCDI2           |---------------------------------------------------- ??????11.2.0.3.0???????SQL??v$database????current_scn????????:???????X$KCCDI???dicur_scn(current_scn)??????? a. ???:????union all,???????,??????????X$KCCDI2(V$DATABASE??????)?VIEW????,??X$KCCDI?X$KCCDI2????,???X$KCCDI??,??: SYS@fmw//Scripts> run  1  select current_scn from v$database  2  union all select current_scn from v$database  3  union all select current_scn from v$database  4* union all select current_scn from v$databaseCURRENT_SCN-----------    5074384    5074385    5074385    50743854 rows selected. ??,X$KCCDI?????????,??????????SCN??????SCN????????“?”SCN? b. ???:???????,??: SYS@fmw//Scripts> run  1  select current_scn,status from v$database,v$instance  2  union all  3* select current_scn,status from v$database,v$instanceCURRENT_SCN + STATUS----------- + ------------------------    5075463 + OPEN    5075464 + OPEN2 rows selected. c. ???:?????????: SYS@fmw//Scripts> run  1* select a.current_scn,b.current_scn from v$database a,v$database bCURRENT_SCN + CURRENT_SCN----------- + -----------    5078328 +     50783291 row selected. ????UNION ALL?????? d. ??,???X$KCCDI??????????????????“??”??=D,????????X$?????????$???,???????,????V$DATABASE?????????????????: SYS@fmw//Scripts> run  1  select dicur_scn from x$kccdi  2* union all select dicur_scn from x$kccdiDICUR_SCN--------------------------------508218350821842 rows selected. SYS@fmw//Scripts> run  1* select a.dicur_scn,b.dicur_scn from x$kccdi a,x$kccdi bDICUR_SCN                        + DICUR_SCN-------------------------------- + --------------------------------5082913                          + 50829141 row selected. ??? Todd Bao ??,???????????,?????????SCN,????V$DATABASE.CURRENT_SCN?,???????“next scn”? ×??,???demo????11.2.0.3.???

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  • ???????????????

    - by Todd Bao
    ?????????,???????????????????,??????????,???????,??????,?????????????: SYS@fmw//Scripts> @showfkparent hr employees---------------|             ||DEPARTMENT_ID| +>-->HR.DEPARTMENTS.DEPARTMENT_ID|             ||JOB_ID       | +>-->HR.JOBS.JOB_ID|             ||MANAGER_ID   | +>-->HR.EMPLOYEES.EMPLOYEE_ID|             |--------------- SYS@fmw//Scripts> @showfkparent sh sales------------|          ||CHANNEL_ID| +>-->SH.CHANNELS.CHANNEL_ID|          ||CUST_ID   | +>-->SH.CUSTOMERS.CUST_ID|          ||PROD_ID   | +>-->SH.PRODUCTS.PROD_ID|          ||PROMO_ID  | +>-->SH.PROMOTIONS.PROMO_ID|          ||TIME_ID   | +>-->SH.TIMES.TIME_ID|          |------------ ????????? ??? 30-08-2012 set echo offset verify offset serveroutput ondefine table_owner='&1'define table_name='&2'declare        type info_typ is record (ct varchar2(30),cc varchar2(30),po varchar2(30),pt varchar2(30),pc varchar2(30));        type info_tab_typ is table of info_typ index by pls_integer;        info_tab info_tab_typ;        max_col_length number := 0;beginwith        cons_child as (select                        owner,constraint_name,table_name,                        r_owner,r_constraint_name                from dba_constraints                where                        constraint_type='R' and                        owner=upper('&table_owner') and                        table_name=upper('&table_name')),        cons_parent as (select owner,constraint_name,table_name                from dba_constraints                where                        (owner,constraint_name) in                        (select r_owner,r_constraint_name from cons_child))select        child.table_name child_table_name,        child.column_name child_column_name,        parent.owner parent_owner,        parent.table_name parent_table_name,        parent.column_name parent_column_name        bulk collect into info_tabfrom        cons_child cc,        cons_parent cp,        dba_cons_columns parent,        dba_cons_columns childwhere        cc.owner = child.owner and        cc.constraint_name = child.constraint_name and        cp.owner = parent.owner and        cp.constraint_name = parent.constraint_name and        cc.r_owner = cp.owner and        cc.r_constraint_name = cp.constraint_name and        parent.position = child.positionorder by 2;if (info_tab is not null and info_tab.count >0) then        for i in 1..info_tab.count loop                if length(info_tab(i).cc) > max_col_length then                        max_col_length := length(info_tab(i).cc);                end if;        end loop;        dbms_output.put_line(rpad('-',max_col_length+2,'-'));                dbms_output.put_line(' '||'|'||rpad(' ',max_col_length,' ')||'|');        for i in 1..info_tab.count loop                dbms_output.put('|'||rpad(info_tab(i).cc,max_col_length,' ')||'|');                dbms_output.put_line(' +>-->'||info_tab(i).po||'.'||info_tab(i).pt||'.'||info_tab(i).pc);                dbms_output.put_line('|'||rpad(' ',max_col_length,' ')||'|');        end loop;        dbms_output.put_line(rpad('-',max_col_length+2,'-'));else        dbms_output.put_line('### No foreign key defined on this table! ###');end if;end;/undefine table_ownerundefine table_nameset serveroutput off Todd

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  • ???Past Image(pi)

    - by todd.bao(at)oracle.com
    Past Image???RAC??????????,????????????????????????????????,Past Image??????????,?????????????????,?????????????????,??????????????(pi)?????????????????Past Image,????????????:HR.EMPLOYEES??100????101?????5????88???????????????,???????????# ??1: ?????????SYS@RAC1//scripts> select inst_id,status from gv$bh where file#=5 and block#=88;no rows selected# ??1???(???Steve King, ????24000????)SYS@RAC1//scripts> update hr.employees set salary=1 where employee_id=100;1 row updated.# ??2: ????1??xcur????????????,?????????SYS@RAC1//scripts> select inst_id,dirty,status from gv$bh where file#=5 and  block#=88;   INST_ID + D + STATUS---------- + - + -------         1 + Y + xcur1 row selected.# ??2???SYS@RAC2//scripts> update hr.employees set salary=2 where employee_id=101;1 row updated.# ??3: ????2?,?????1??pi??Past Image,???????????????????????SYS@RAC1//scripts> select inst_id,dirty,status from gv$bh where file#=5 and  block#=88;   INST_ID + D + STATUS---------- + - + -------         1 + Y + pi         2 + Y + xcur2 rows selected.# ??1???SYS@RAC1//scripts> update hr.employees set salary=3 where employee_id=100;1 row updated.# ??4: ????1?,?????2???1???????2???????1???????SYS@RAC1//scripts> select inst_id,dirty,status from gv$bh where file#=5 and  block#=88;   INST_ID + D + STATUS---------- + - + -------         1 + Y + pi         1 + Y + xcur         2 + Y + pi3 rows selected.# ??2????SYS@RAC2//scripts> update hr.employees set salary=4 where employee_id=101;1 row updated.# ??5: ????2?,??????????????,DBWR??,??????,??(pi)?????????????(cr)??????????????????????????SYS@RAC1//scripts> select inst_id,dirty,status from gv$bh where file#=5 and  block#=88;   INST_ID + D + STATUS---------- + - + -------         1 + N + cr         1 + N + cr         2 + Y + xcur3 rows selected.# ?????1???SYS@RAC1//scripts> update hr.employees set salary=5 where employee_id=100;1 row updated.# ??6: ????1?,?????2????????????????,?????????SYS@RAC1//scripts> select inst_id,dirty,status from gv$bh where file#=5 and  block#=88;   INST_ID + D + STATUS---------- + - + -------         1 + Y + xcur         1 + N + cr         1 + N + cr         2 + Y + pi4 rows selected.# ??2???SYS@RAC2//scripts> update hr.employees set salary=6 where employee_id=101;1 row updated.# ??7: ????2?,?????1?2????1???????2?????????????4,????????????????SYS@RAC1//scripts> select inst_id,dirty,status from gv$bh where file#=5 and  block#=88;   INST_ID + D + STATUS---------- + - + -------         1 + Y + pi         2 + Y + pi         2 + Y + xcur3 rows selected.# ??1???SYS@RAC1//scripts> update hr.employees set salary=7 where employee_id=100;1 row updated.# ??8: ????1?,?????2?1????2???????1????????????2????????????????????????????????????(????????)????SYS@RAC1//scripts> select inst_id,dirty,status from gv$bh where file#=5 and  block#=88;   INST_ID + D + STATUS---------- + - + -------         1 + Y + pi         1 + Y + xcur         2 + Y + pi         2 + N + cr4 rows selected.??????????, ?xcur??????????:??????xcur????pi?????pi?(?????)???cr?,???cr?????,pi????????????????????????????:?????????????A?B?A:SYS@RAC1//scripts> run  1  begin  2  for i in 1..100000 loop  3  update hr.employees set salary=i where employee_id=100;  4  end loop;  5* end;B:SYS@RAC2//scripts> run  1  begin  2  for i in 1..100000 loop  3  update hr.employees set salary=i where employee_id=101;  4  end loop;  5* end;?????????,???5???88?????buffer cache???????:SYS@RAC2//scripts> select count(*) from gv$bh where file#=5 and block#=88;  COUNT(*)----------       4121 row selected.??409?????????(cur):SYS@RAC2//scripts> select count(*) from gv$bh where file#=5 and block#=88 where status='cr';  COUNT(*)----------       4091 row selected.1????????(xcur):SYS@RAC2//scripts> select count(*) from gv$bh where file#=5 and block#=88 where status='xcur';  COUNT(*)----------           11 row selected.??...2??????--????(pi)??????????SYS@RAC1//scripts> select inst_id,dirty,status from gv$bh where file#=5 and block#=88 and status='pi';   INST_ID + D + STATUS---------- + - + -------         1 + Y + pi         2 + Y + pi2 rows selected.????,???RAC??????????????(cr)?,????????????????????????xcur?pi??cr??????pi?????? ?????????,???????????pi???cr?,?????????cr???,???xcur???????,pi??????xcur?,[email protected]

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  • Python coding with VLC player (quite a basic query I expect)

    - by Todd
    I'm fairly new to the whole coding realm so my knowledge is fairly limited, and I can't seem to find any basic tutorials on how to use scripts with VLC player. More specifically, the reason I'm asking here is because I stumbled across a post on this site about playing random clips from random videos on VLC player automatically. This is the forum post: Playback random section from multiple videos changing every 5 minutes My situation is similar to this lovely gentleman's was, though he clearly knows a lot more about coding than I do. In short, I'd like to copy this coding into a file of some sort and apply it to VLC player myself. Only I'm not sure what file type I'd have to save it as (I have Python by the way, and I tried saving it as a .py file but I didn't know if it was correct or where to go from there). Additionally, I'm not sure how to get VLC to "read" the script, so to speak - is there a specific location the file needs to be, and do I run the script from another program or through VLC? I'll reiterate that I'm relatively new to this, so if anybody would be so kind as to post a quick list of steps on how to save/place the file and use it with VLC player I really would appreciate it! P.S. I'm not computer illiterate, I'm fine with most programs and I'd understand if you just said things like "C:\Program Files (x86)\VideoLAN\VLC\plugins" or "in VLC, select Tools Plugins and extensions", I just wouldn't catch on to anything about adding a line of coding that does something without being told exactly what to write! Many thanks in advance! :) Todd

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  • Beginner question - Loop invariants (Specifically Ch.3 of "Accelerated C++")

    - by Owen
    Hi - as I said, a complete beginner question here. I'm currently working my way through "Accelerated C++" and just came across this in chapter 3: // invariant: // we have read count grades so far, and // sum is the sum of the first count grades while (cin >> x) { ++count; sum += x; } The authors follow this by explaining that the invariant needs special attention paid to it because when the input is read into the variable x, we will have read count+1 grades and thus the invariant will be untrue. Similarly, when we have incremented the counter, the variable sum will no longer be the sum of the last count grades (in case you hadn't guessed, it's the traditional program for calculating student marks). What I don't understand is why this matters. Surely for just about any other loop, a similar statement would be true? For example, here is the book's first while loop (the output is filled in later): // invariant: we have written r rows so far while (r != rows) { // write a row of output std::cout << std::endl; ++r; } Once we have written the appropriate row of output, surely the invariant is false until we have incremented r, just as in the other example? It's probably something really obvious, anyone could enlighten me as to what makes these two cases different, that'd be great - and thanks in advance for taking the time to answer such a complete novice question. Owen

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  • per terminal bell in ubuntu classic

    - by Owen Maresh
    I'm using natty. I'm using classic. I use raw xterms (the latest build, 270, in fact). I've done xset b 100 pactl upload-sample /usr/share/sounds/ubuntu/stereo/message.ogg bell.ogg But I want something more fine grained than this: I want to say "if the bell originated in some particular pseudoterminal make a particular sound, but if it originated in some other particular pseudoterminal, generate some other sound"

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  • Upgrading Agent Controllers

    - by Owen Allen
    There was an update for Oracle Solaris Agents not too long ago. Over on the Oracle Enterprise Manager blog, Steve Stelting has put together a detailed walkthrough for upgrading your environment. It covers downloading the Agent update, seeing what Agents need to be upgraded, and performing the upgrade itself Speaking of which, the Oracle Enterprise Manager blog often has in-depth posts about Ops Center, so it's well worth a look if you don't follow it.

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  • How can I set a per terminal bell with xterms?

    - by Owen Maresh
    I'm using natty. I'm using classic. I use raw xterms (the latest build, 270, in fact). I've done xset b 100 pactl upload-sample /usr/share/sounds/ubuntu/stereo/message.ogg bell.ogg But I want something more fine grained than this: I want to say "if the bell originated in some particular pseudoterminal make a particular sound, but if it originated in some other particular pseudoterminal, generate some other sound"

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  • Migrating an LDOM from a T4 to a T5

    - by Owen Allen
    I got a question about LDoms: "Is there any restriction against migrating LDoms between the T4 and T5 platforms?" The only restriction is that, at present, you can't do a live migration. However, with Ops Center 12.1.4, you can put T4 and T5s together in a Server Pool and either manually migrate the LDoms to a new host or configure them for automated cold-migration failover. Take a look at the Server Pool and Oracle VM Server for SPARC chapters for more information.

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  • How do I point a new domain to start on a page that's not index.html on separate hosting? [closed]

    - by Owen Campbell-Moore
    Possible Duplicate: How do I point a new domain to start on a page that's not index.html on separate hosting? I'm using a service called SquareSpace to host my site, and today I'm registering the domain for it. Basically, how do I make it so when somebody types www.tedxoxford.com it points at http://www.tedxoxford.com/landing (currently http://tedxoxford.squarespace.com/landing) instead of the default index? Is this possible? Squarespace is quite a restricted CMS and means that your logos etc all point to the index so I don't want people ending up on my landing/splash page every time they want the home page, only on the first time they type in the URL. A dirty hack would be to check the refferer and redirect anyone hitting the index to the landing page, but that's a lot of loading overhead I'd rather avoid...

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  • Provisioning Videos

    - by Owen Allen
    There are a couple of new videos up on the Oracle Learning Youtube channel about Ops Center's provisioning capabilities. Simon Hayler does a walkthrough of a couple of different procedures. The first video shows you how to provision Oracle Solaris zones. It explains how to create an Oracle Solaris Zone profile, and then how to apply it (using a deployment plan) to a target system. The second video shows you how to provision an x86 server with Oracle Solaris. This uses a very similar process - you create a OS provisioning profile, then use a deployment plan to apply it to the target hardware. The documentation goes over OS provisioning and zone creation in the Feature Guide, if you're looking for additional information.

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  • Article about Sun ZFS Storage Appliances

    - by Owen Allen
    Sun ZFS Storage Appliances are versatile storage systems. Discovering and managing them in Ops Center, though, makes them even more versatile. If you discover a Sun ZFS Storage Appliance in Ops Center 12c, you can create iSCSI and Fibre Channel LUNS, and make the LUNs available to server pools and virtualization hosts as a storage library. Barbara Higgins has written an excellent article that walks you through the process of setting up a Sun ZFS Storage Appliance and discovering and managing it in Ops Center. If you're looking into ways to make a Sun ZFS Storage Appliance work for you, it's worth a look.

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  • Workflow: Operate Zones

    - by Owen Allen
    The Operate Zones workflow is another of the workflow documents that we introduced recently. It follows naturally after the Deploy Oracle Solaris 11 Zones workflow that I talked about last week, so I thought I'd talk about it next. This workflow is less linear than the zone deployment workflow. It's built around this image: The left side shows you the prerequisites for zone operation: you have to deploy libraries and deploy either Oracle Solaris 10 or 11 zones - whichever type you want to manage using this workflow. Once you have the zones deployed, you can begin to operate them. If you want to associate resources with the global zone, the workflow directs you to the Exploring Your Server Pools how-to, which talks about adding global zones to server pools and associating libraries and network resources with them. Otherwise, it directs you to a set of how-tos about zone management: Managing the Configuration of a Zone, which explains how to add storage, edit zone attributes, and connect zones to networks; Lifecycle Management of Zones, which explains how to halt, shut down, boot, reboot, or delete a zone; and Migrating Zones, which explains how to move a zone to a new global zone in the same server pool. Finally, it directs you to the Update Oracle Solaris workflow when you want to update your zones, and to the Monitor and Manage Incidents workflow to learn more about monitoring your assets.

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  • How To: Use Monitoring Rules and Policies

    - by Owen Allen
    One of Ops Center's most useful features is its asset monitoring capability. When you discover an asset - an operating system, say, or a server - a default monitoring policy is applied to it, based on the asset type. This policy contains rules that specify what properties are monitored and what thresholds are considered significant. Ops Center will send a notification if a monitored asset passes one of the specified thresholds. But sometimes you want different assets to be monitored in different ways. For example, you might have a group of mission-critical systems, for which you want to be notified immediately if their file system usage rises above a specific threshold. You can do so by creating a new monitoring policy and applying it to the group. You can also apply monitoring policies to individual assets, and edit them to meet the requirements of your environment. The Tuning Monitoring Rules and Policies How-To walks you through all of these procedures.

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  • Agent versus Agentless management

    - by Owen Allen
    I got a couple of questions about Agentless asset management: "What does agentless management do for an asset?" Agentless management is one of the two ways that you can manage an operating system. Rather than installing an Agent Controller on the OS, agentless management uses SSH to regularly check the system and gather monitoring data. Many of the actions that would be available on an agent-managed system are available on an agentless system, but actions such as running reports or updating an Oracle Solaris 10 or Linux OS are not available. A table showing the capabilities of agentless management is here. "What permissions does agentless management require?" Agentless management still requires root credentials. If you can't log into the system as root, you can provide one set of credentials for the login, and then a set of root credentials to switch to.

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