In general, RAID 0 or not faster?
In general, if it can be generalized, is two drives in RAID 0 faster than the same two drives not in a RAID? Or does it depend on other factors such as system specs?
Peru Bob wrote:
I was just wondering if I had a hard drive failure, would using five separate discs be any slower.
Yes it would definitely be slower so it depends on what media (and their codecs) you are using. If you have access to Harm's latest data on PPBM7 you can see what he recommends for different codecs.
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Current xserve raid speed rate not fast enough
guys,
my xserve raid having problem when i edit HD project 1920*1080, its ok when i edit, but when i view all 30 mins movie, its hang when play till 5 mins of the movie, and keep on hanging after that, why is that? is it because the setting of my xserve raid got problem? read n write speed not fast enough?
help plzzzzBoth the write cache ticks should be on, The allow host cache flushing should be off. The use steady streaming mode tick should be off also. (So the pattern of th ticks is: on, off, on, off)
The stripes stting depends on the cache size of the disk. On disks with lower than 16 MB, the 8 stripes setting is right. On disks from 16MB cache you can use the 128 stripes setting (In general the 750 GB disks have 16 MB, the others have lower). -
Materialized view not fast refreshable
I need to calculate a moving total in a materialized view - that is, calculate subtotal for rows starting at current row up to the first row.
I am using a window function, as shown below.
The problem is, MVs using window functions are not fast refreshable, and I need this MV to be fast refreshable.
Is there any other way of getting the moving total without using a window function?
CREATE MATERIALIZED VIEW BIL_BI_OPDTL_MV_11_TST
--REFRESH FAST ON DEMAND
AS
SELECT
fact.txn_time_id txn_time_id
, fact.effective_time_id close_time_id
, prntmv.parent_group_id
, jgd.parent_group_id sales_group_id
, fact.lead_id
, fact.opp_open_status_flag
, fact.win_loss_indicator
, fact.forecast_rollup_flag
,fact.rev_flag1
, SUM(fact.rev_flag1) OVER (PARTITION BY
fact.effective_time_id , prntmv.parent_group_id
, fact.lead_id, fact.opp_open_status_flag, fact.win_loss_indicator, fact.forecast_rollup_flag
, to_number(to_char(opty_creation_date,'J'))
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ORDER BY fact.lead_id
ROWS UNBOUNDED PRECEDING) moving_total
, to_number(to_char(opty_creation_date,'J')) opty_creation_time_id
, to_number(to_char(opty_conversion_date,'J')) opty_conversion_time_id
,count(*) cnt
FROM bil.bil_bi_opty_ld_f_tst fact, bil_bi_rs_grp_mv rgmv, bil_bi_rs_grp_mv prntmv,
jtf.jtf_rs_groups_denorm jgd
WHERE rgmv.sales_group_id = fact.sales_group_id
and rgmv.salesrep_id = fact.salesrep_id
AND fact.sales_group_id = jgd.group_id
AND prntmv.sales_group_id = jgd.parent_group_id
AND prntmv.umarker in ('top_groups', 'groups')
AND jgd.active_flag='Y'
group by
fact.txn_time_id,
fact.effective_time_id
, prntmv.parent_group_id
, jgd.parent_group_id
, fact.lead_id
, fact.opp_open_status_flag
, fact.win_loss_indicator
, fact.forecast_rollup_flag
, fact.rev_flag1
, to_number(to_char(opty_creation_date,'J'))
, to_number(to_char(opty_conversion_date,'J'))Please post your question at
General Database Discussions
for faster response -
Raid Utility Error Message "raid utility is not supported on this computer"
I am not doing anything that I know of, but Raid Utility keeps opening up on its own, and a message pops up multiple times a day telling me "raid utility is not supported on this computer"
Anyone have any idea how to fix this?Network startup is if you want to start your macbook using a network drive.
Keep your startup settings at your current drive.
Raid utility doesn't apply to you since you only have one hard drive installed, unless you installed another hard drive in your optical bay.
Fibre Channel is another type of hard drive connection via network connection.
You can't access things you don't have installed in your macbook. Those are there in case you decide to have a network drive start up options, a raid configuration of a fibre channel network drive. -
I have a problem. When I start to sync music to my iPod touch, you have to enter the password of your account. I downloaded the game from the general account, and do not always know the password. He writes that if I do not login, then the game will be erased. Previously, this was not. When starting to sync music, it did not touch my programs, and now because of this music can not be transferred to iPods. PANIC AT ME! HELP
If they are Tunes purchased music you have to sing into the account that purchased them.
Is this the iTunes library/computer you sync with? You can rally only "sync" with one iTunes library/computer.However, yo can manually manage music and videos among different libraries/computer. See the manual method of:
iTunes 11 for Windows: Set up syncing for iPod, iPhone, or iPad -
RAID Utility does not work after Vista upgrade
Hi,
I have a Qosmio G30 with 2 HD 120GB each. After I upgraded to Windows Vista from Windows XP, the Toshiba RAID Utility does not work anymore. In WXp it worked OK, but in Vista there is no way I can mirror the HD. That is, the utility itself work, but the button that should say Mirror, or something like that is not shown. I have set the drives to RAID-1 in the BIOS, but no go.
Is there any way to get the software RAID to work again?Hi,
just a little question: While installing vista, did you installed the RAID-driver at installation time? Maybe this could be the reason why RAID cannot be activated properly.
Please give some feedback, if you installed the RAID drivers for Vista during the installation..
Cheers -
i bought an new ipad 3rd gen 16 gb wifi cellular in may 2012. I hv a unique problem wherein the screen of ipad is not as smooth as what is general experience. Its not buggy but lacks smoothness and finger doesnot glide as smoothly .Can anybody help.
Do you clean your iPad screen? Do not use standard window cleaners, with ammonia or alcohol, like Windex, but a damp towel, followed by a micro-fibre cloth is recommended. There are also cleaners you can buy which are specifically designed for iPad/iPhone devices, such as iClean from Monster.
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When I go to settings>General, software update is not one of the options. Now what do I do to update my phone?
Read the entire article.
Not just the first part.
It tells you how to update via itunes:
Learn about iOS: How to update your iPhone, iPad, or iPod touch -
Hi,
I am really struggling to update my iphone software. I believe that I am currently on version 4.2.1 and would like to update yet my general settings menu does not offer a software update option.
What would be the best steps to take?
Any help would be great.
Thanks
TConnect to iTunes on the computer you usually Sync with and “ Check for Updates “...
If an Update Appears Install it... if not... you are up to date for your particular Device...
See the Using iTunes Section Here...
How to update your iPhone, iPad, or iPod touch -
Under "Settings/General" "Software Updates" is not an option. So........How do i get updates?
Settings>General>Software Update if iPad is currently on IOS 5 and above.
If your are using IOS 4, see below.
http://support.apple.com/kb/HT4972 -
when i go to settings<general< update settings dose not appear
how can i update my software /Go back to the article you asked this question from, ignore the instructions for updating it wirelessly, scroll down, and follow those for updating it from iTunes on a computer.
(81448) -
I am using an I-mac series 4 with a 2GHZ processor, I tried to convert to Lion and the rresponse was the chip was not fast enough, can I upgrade the chip or do I need to purchase a new computer?
Unfortunately yes, but Snow Leopard is still a great OS in the meantime so don't rush in too quick if you really don't need to.
Good Luck
Pete -
RAID admin software not fixed by Quicktime 7.12
Hi
I too have had the RAID admin software not launch recently and all evidence points to recent Quicktime updates as discussed by others.
The latest quicktime update does not resolve this!
So in interests of a workaround I have written a small app which uses a terminal command listed in the thread-
http://discussions.apple.com/thread.jspa?messageID=1553067
This app relies on the fact that the RAID admin file is resident in /Applications/Utilities/Xserve\ RAID\ Update/
If the admin app is not here the launcher will not work!
I have tested this on Panther 10.3.9 Server
Drop me a line at edadams70 at gmail.com to get this launcher
Regards
Edcan you share the app with us?
I'm on quicktime 7.1.2 and it ***** cause there is no reinstall for it. Just tomorrow i'm receiving a second 14 disk rack and i'll be damned if i can't configure it.
APPLE GET TO WORK! Release QT uninstall! -
I can not found SIRI in my iphone 4s, it does not appear even in settings / general, or in settings / general / restrictions. Can not be installed?
Huntress Hello how are you? My name is Celso (Brazil), I spoke with you last week about having received an iphone 4 when he bought an 4S. Luckily I could return it to the store and bought a real 4S. Now really rather have the Siri and everything elsethat 4S offers. Thank you for your help. Good evening.
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All of a sudden I can only hear my podcasts in "fast" voices...not fast enough to not understand but just fast enough not to be "real"
Re: That garbage is unreadable.
If you really want help, stop messing with the fonts and post so that others can read and offer suggestions.
Or better yet... try a search, I'm certain you'll find a solution to whatever issue you're experiencing.
I have found that many times it is the things that make you most angry that push you to action. This was the case here. Thank you for causing me to get so angry that I found the answer myself.
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