Why difference between DSL speed tests?
I have the basic High Speed DSL account that Verizon is representing as being capable of .5 - 1 mbps. But I've never gotten anything more than 120 kbps download and 35 kbps upload speeds in 'real world' file transfer tests.
However all the online speed test websites I've used, as well as the one the Verizon repair technician used when he came out here, return results from 750 kbps - 1 Mbps down, and 275 kbps - 400 kbps up.
I've done my own download speed tests on 3 different PCs via FTP, Bittorrent, and HTTP protocals, and none ever get more than 120 kbps down. Firewalls can limit transfer rates, but I've shut them all down, and still only get a max of 120 knps down.
Can anyone explain why there's such a disparity between the speed test results from all these various Inet speed test websites, and my actual real world transfer rates?
Thx
ritz
As an FYI, we used to use a factor of 10 going from bytes to bits rather than a factor of 8. Start bits, stop bits, parity, etc. I suppose it means less with large frames, but there is still some overhead.
Similar Messages
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Difference Between "The speed coming into your hou...
Hi,
I've just run the BT speed test and received the following figures:
The speed coming into your house: 21.4Mb
The speed you get at your computer:
Download speed 7.8Mb
Upload speed 0.99Mb
The computer is connected directly to a HH4 via ethernet cable and the figures above are for only this PC connected (with gigabit NIC and into the gigabit socket on the HH. (No other software running etc.)
Can anyone tell me how I could go about increasing the download figure?
Is the delay likely to between the outside line and the HH or between the HH and the PC?
Many thanks.
Solved!
Go to Solution.Thanks for the very quick reply imjolly.
The lines from the log read:
17:23:19, 28 Nov.
(17770.250000) DSL noise margin: 5.80 dB upstream, 3.10 dB downstream
17:23:18, 28 Nov.
(17769.230000) DSL line rate: 1168 Kbps upstream, 20834 Kbps downstream
Interestingly, the speeds on the speed test page show 7.77 download / 0.99 upload / 36.25 ping. (The speed test page at: http://diagnostics.bt.com/login/?workflow=Speed is showing 20.8 from the exchange and 7.76 at the PC)
The results of the diagnostic test are:
FAQ
1. Best Effort Test: -provides background information.
Download Speed
7.77 Mbps
0 Mbps
7.15 Mbps
Max Achievable Speed
Download speedachieved during the test was - 7.77 Mbps
For your connection, the acceptable range of speeds is 2 Mbps-7.15 Mbps.
IP Profile for your line is - 7.15 Mbps
2. Upstream Test: -provides background information.
Upload Speed
0.99 Mbps
0 Mbps
0.83 Mbps
Max Achievable Speed
Upload speed achieved during the test was - 0.99Mbps
Additional Information:
Upstream Rate IP profile on your line is - 0.83 Mbps
I'm connected directly via a filter to the test socket and the master is the only phone socket in the house.
The quiet line test sounds quiet! (No crackling or background noise).
Hope this is all you needed. Thanks again. -
Difference between Real Application Testing and Application Testing Suite?
We need to find out average time to execute critical reports. Some reports takes about 24 hours to execute. We want to predict the times of future reports after benchmarking our current DB.
(1.) Which of the 2 should we use (RAT or ATS)?
(2.) What are the differences between the 2?
(3.) Can these products be used in both 10g and 11g DBs?
(4.) Are these 2 ''options'' that come with the DB? or
(5.) Do we have to purchase them separately and install separately?
(6.) Does these tools have Windows interfaces?Thanks aamat.
Most of our DBs are and will be in 10g. I think it will take at least a year or two to move to 11g. So we are basically stuck with 10g.
So you’re saying we need a 11g DB to run RAT. I.e. you have to install RAT in a 11g. That wont suite our requirements since our DBs are in 10g.
About ATS: The most demanding/frequent requirement from our prospective customers is:
> "We create an ad-hoc report query. How do we find out the time it will take to execute it?"In order to solve this we are hoping to suggest this to our customers:
1.) Replicate the servers and DB (with real data) in another identical machine.
2.) Select about 10 report queries which normally takes a long time to execute.
3.) Execute them and get the times (For single and multiple users).
4.) These will form the benchmark.
*[Q1.]* Now, can our prospective users, use ATS do this. I.e. Can they, the users on their own operate ATS (of course after giving them training)?
*[Q2.]* Can ATS use the output of the previous (i.e. benchmark) SQL queries (with live data) and if given another SQL, estimate the time it will take to execute it?
-- i.e. can ATS compare the tables, SQL query and times of past results and give us an estimate for our new query?
*[Q3.]* If this is not possible in ATS can it be done it RAT? In this case we will have to demand that they upgrade to 11g.
Edited by: Channa on Aug 26, 2010 6:56 AM -
I am trying to figure out the "Free Disk Space" on a VM on Hyper-V host.
When I see the available space inside the VM, shown by Microsoft OS, it is less than, what is reported by the ‘Inspect Disk’ utility of Hyper-V Manager.
Why this difference?Hi,
Is it the exactly 10% free space when the issue occurs? Please run a chkdsk in CMD on that partition and see the size of available space matches the 10% - I'm thinking if it is actually full when a part of disk space is not calculated.
In my test I created a 9.87GB partition and keep copy a 1GB file on it. Now it only has about 130MB free space but I can still add txt file with small size onto it. So what's the exact message you got?
If it is a warning (but users can still add files onto it), please see if this will help:
Description of the Low Disk Space Notification in Windows XP
http://support.microsoft.com/kb/285107/en-us
This can help us get rid of the Red Status when disk space running low.
Also see this thread:
Incorrect low space warning (red usage bar) in Computer
http://answers.microsoft.com/en-us/windows/forum/windows_7-performance/incorrect-low-space-warning-red-usage-bar-in/b42d61fd-9f5b-41d3-939a-83724aabab71
If you have any feedback on our support, please send to [email protected] -
Export java code out of database? difference between Prod and Test
Hi all,
I'm a seasoned DBA, but I have never really dealt with Java, so this is all new to me. Within one of my test databases (10.2.0.3.0), I have a database package - within the package is a procedure that has this Java call:
language java name 'com.clinapps.pmd.etl.interfaces.forecasting.itemtrial.helper.SSFItemOutboundPMDHelper.processSSFItemInterface()';
This Java code goes and exports a file to .xml format. The basic problem is that in our Test environment, there is a problem in the xml file that gets generated - the second line is missing the first few characters. However, in all of our other environments, including Production and Validation, it all works fine - the xml file is good. What has me confused, is that we've done several database refreshes, where we export from production, then import it down to test. So from everything I'm looking at, the schema is exactly the same - but something is different, causing the issue in the xml file that is being generated. I was wondering if I could get into the database and export the Java code, then that is something where I could confirm if there's a difference or not, from Prod to Test.
Does anyone have any input/feedback on how to do this? I've been googling, and tried several methods, including dbms_metadata.get_ddl, and DBMS_JAVA.EXPORT_SOURCE, but I can't get anything to work.
Or if anyone has any other thoughts on how to debug/troubleshoot this, I'd appreciate any ideas!!
Thank you from a Java newbie!!OK, that is helping me get somewhere!! If I change the query to this, I am getting results:
select obj_num,long_name from SYS."KU$_JAVA_CLASS_VIEW" where LONG_NAME like '%SSFItemOutboundPMDHelper%';
171879
com/clinapps/pmd/etl/interfaces/forecasting/itemtrial/helper/SSFItemOutboundPMDHelper
Note that it has the / instead of the . as the differentiator
Now if I do the second query, I see this:
SQL> select * from SYS."KU$_JAVA_OBJNUM_VIEW" where OBJ_NUM=171879;
OBJ_NUM DATAOBJ_NUM OWNER_NUM OWNER_NAME
NAME NAMESPACE SUBNAME
TYPE_NUM TYPE_NAME CTIME MTIME
STIME STATUS REMOTEOWNER
LINKNAME
FLAGS OID SPARE1 SPARE2 SPARE3
SPARE4
SPARE5
SPARE6
171879 123 PMD50
/34bae3f1_SSFItemOutboundPMDHe 1
29 JAVA_CLASS 2012-06-28 10:44:22 2012-06-28 10:44:22
2012-06-28 10:44:22 1
8 6 65535
Any thoughts on where to go from here?? -
Difference between downstream speed and Home Hub 4...
Using a number of speed checkers I am getting a downstream speed of approx 7mb to my router but only 1.9mb from my home hub4 to my devices. This is irrespective of whether I connect to my router by cable or wireless. I have reset my router and have disconnected all telephone cables from their sockets for about 40 minutes before reconnecting and resetting the router. Any suggestions as to why this should be and how I can improve this?
Solved!
Go to Solution.The mods will post a contact us link probably tomorrow now.
After completing the email NOT PM then you join a queue of other customers waiting for mod help. The mods will get back to you in 3/5 working days either by phone or email
If you like a post, or want to say thanks for a helpful answer, please click on the Ratings star on the left-hand side of the post.
If someone answers your question correctly please let other members know by clicking on ’Mark as Accepted Solution’. -
What is the difference between Apple Diagnostic test and Apple hardware test?
I've just been wondering if one is better than the other? My mac shipped with apple hardware test, and I'm curious if the newer Apple Diagnostics is better
Apple Diagnostics is better, but no Mac model can use both it and the Apple Hardware Test.
(122151) -
Upgraded to 3M, DSL speed has not increased
Hi, I took advantage of a special offer Verizon had a month or two back, and upgraded from 1.5mbps DSL to 3.0mbps.
However, speeds appear to be exactly the same as they were. I even ran the DSL speed tests, and it confirmed that I was still getting about 1.5mbps. Now I realize that this says "up to " 3mbps, but still, shouldn't it be breaking the 1.5 barrier? If not, why aren't I being charged the 1.5mbps price?
If I need new equiptment to get the faster speed, I haven't received any. Any ideas?You should post your transceiver statistics (from http://192.168.1.) That will provide some indication of what the line is capable of.
No new equipment is needed to go from 1.5mbps to 3.0mbps.
The speed you get is the lower of the Verizon provisioned speed, or the highest speed that the modem can successfully negotiate with the Central Office equipment. That is a function of quality and length of the copper pair that connects you to the Central Office.
As others have pointed out, sometimes the issue is inside the house wiring, in which case a new outlet and a 'whole house' filter at the Network Interface will usually fix it.
Good luck -
Difference between Transceiver Statistics vs. Speed tests
We had been having problems with our DSL speed today. We discovered (obviously) that most of the problem was that my son was watching Netflix on our TV (through an app directly on the tv, not through a game console), which was sucking up most of our bandwidth.
But, while testing things out, we checked our Transceiver Statistics. We are getting about 3300 mbps download, but after running two different speed tests (speedtest.net and bandwidthplace.net), it seems we only ever really get about 1.5 - 1.6 mbps. This was after turning off the Netflix stream, by the way. This is basically our normal speed.
At any one time, we have 2 laptops and 2 Android phones connected to our network through a Beklin wireless router, as well as a desktop connected to the Belkin router through an ethernet cable. The tests have been consisten regardless of the number of computers running at the time, as long as they aren't doing anything with a real network load.
I don't think it's a problem with the router, because we can copy files between the computers at about 4 megabytes per second (36 megabits per second). Althought the WiFi connection says it's running at about 130 megabits per second. Maybe that's an issue with disk speed, I don't know...
Anyway, is there anything weird going on, or is it a symptom of outside network load that our speed tests are roughly half the value we see on the Transceiver Statistics for the modem?
Here is the full details from our Westell modem Transciver Statistics:
Transceiver Revision: 7.1.254
Vendor ID Code: 4
Line Mode: G.DMT-Mode
Data Path: Interleaved
Transceiver Information
Down Stream Path
Up Stream Path
DSL Speed (Kbits/Sec)
3328
512
Margin (db)
7.0
12.0
Line Attenuation (db)
42.0
18.5
Transmit Power (db/Hz)
14.0
11.0
Solved!
Go to Solution.The transceiver stats only measure the speed of the connection between your DSL Modem/Router and the Central Office Equipment. You can get the full 3mbs downlink speed with losses a lot higher than 42db I have seen it above 60db and still providing 3mbps.
However the link between your modem and the Central office is only small part of the total path between your computer and whatever internet site you are connecting too. Speed tests measure end to end, as opposed to only a small part of the message path. As a result speed tests almost always show lower performance than transceiver stats.
The best analogy is Verizon effectively only provides the on and off ramps to the Internet Superhighway. Just because the local ramp is clear is no assurance there aren't traffic jams elsewhere on the highway. The problem with most speed tests is you have no idea how your traffic was actually routed, and what constraints may be placed on it by parts of the network that Verizon has no control over.
The transceiver stats represent the best possible case. The reality is there is no shortage of issues upstream from the central office, either on, or off the Verizon network that can restrict your actual speed to considerably less than 3mbps. It is unlikely that your wiring inside the house is an issue, if it was, you would be seeing a downlink speed at less than 3mbps.
However your uplink speed seems slow. The nominal uplink for the 3mbps tier of DSL service is 768kbps, not 512kbps. -
Difference between BT Broadband Speed Test and all...
I have recently moved to BT Broadband from TalkTalk as I was dissatisfied with the speeds that I was getting with my TalkTalk line – they were OK outside of peak time but woeful in peak time. With TalkTalk, I was on their ‘up to’ 8Mbps which, in practice, translated to about 6Mbps for download outside peak times but dropped to below 1 Mbps in peak (around 500Kbps and sometimes even lower!) – these measurements were taken regularly with both the TalkTalk and Think Broadband speed tests which were usually roughly in agreement and I haven’t had to rely on memory as I downloaded the spreadsheet records available to Think Broadband registered users.
I am now posting this in the hope that somebody can explain the difference between the BT Broadband Speed Checker (Here) and all the others available on the web.
When you are first connected to BT Broadband they warn you that your speeds will vary over the first ten days while they test your line to ascertain optimum speeds for it. During that time, I checked it every day early, mid-day and evening (usually around 0630, 1230 & 2000 hrs) with Think Broadband and, yes, it did vary – the first day it started at around 1Mbps for download but rose to 10Mbps by the end of the day. On the second day, it rose to a peak of 17.8Mbps which was unbelievably fast to use (well, to me anyway) but never reached that speed again as over the rest of the ‘test period’, the download speed dropped and dropped to the point where I am now outside of the BT test period and consistently seeing only 2 to 2.5Mbps over a 24 hour period.
I emphasise that those speeds were all recorded using Think Broadband but I am now doing tests using the BT checker mentioned above and the speeds which BT indicate for downloads are consistently in the 14 to 18 Mbps range. If I do the BT and TB test in quick succession, they generally show the BT calculated speed to be better than that of TB by a factor of around 7 (ie. TB at 2 Mbps whilst BT show 14Mbps). Now either they are measuring different things (or the sams things differently) or one of them is lying – all I know is that my general browsing experience is slower outside of peak times and I can tell by the time it takes to load pages.
I might have misunderstood something in these tests but I am now beginning to regret that I fell I for the BT sales pitch which promised me ‘up to’ 20 Mbps but ‘more likely’ 17 Mbps. I have tried to discuss thisl with BT Broadband technical support but they were no use whatsoever – indeed, I got the impression that he was reading from a script and as it didn’t cover my issue, I was wasting my time – it would also have helped for English to be his first language!
According to the BT test, I am well within their ‘minimum guaranteed access speed’ (Here). for my area (about 4Mbps) and therefore cannot do anything about it. BUT that is only when measured using the BT speed tester – with any other, I am well below. I am beginning to feel very conned and might even start looking to withdraw from BT if I cannot get this settled.
Can anybody help. I will happily post detailed records of my various tests or router stats if they will help.
Thanks in advance.OK, I have now done all the tests etc. And here are the results:
ADSL Line Status from HomeHub 3
Connection Information
Line state:
Connected
Connection time:
0 days, 00:27:11
Downstream:
23.71 Mbps
Upstream:
1.176 Mbps
ADSL Settings
VPI/VCI:
0/38
Type:
PPPoA
Modulation:
G.992.5 Annex A
Latency type:
Fast
Noise margin (Down/Up):
3.4 dB / 6.4 dB
Line attenuation (Down/Up):
5.3 dB / 2.1 dB
Output power (Down/Up):
19.4 dBm / 11.6 dBm
FEC Events (Down/Up):
0 / 0
CRC Events (Down/Up):
41 / 24
Loss of Framing (Local/Remote):
0 / 0
Loss of Signal (Local/Remote):
0 / 0
Loss of Power (Local/Remote):
0 / 0
HEC Events (Down/Up):
20 / 7
Error Seconds (Local/Remote):
61 / 13
BT Speed Test Result
Download Speed: 6.59Mbps
Acceptable Range: 4Mbps - 21 Mbps
IP Profile: 21.42Mbps
Upload Speed: 0.99Mbps
Upstream IP Profile: 0.83 Mbps
Think Broadand Speed Test
Download Speed: 1.8 Mbps
Upload Speed: 0.9 Mbps
Uswitch Speed Test
Dowload Speed: 1.7 Mbps
Upload Speed: 0.9 Mbps
For what it's worth, I followed the guidelines for the BT test and took all of the tests within a 10 minute period.
All I know is that my daytime BT connection is nowhere near as fast as I had from TalkTalk. Indeed, it was not even quick enough to watch non-HD YouTube videos earlier this morning without freezing to buffer. -
AppleScript speed difference between 10.4 & 10.5
This post is related to a question I posed in March 2009 (https://discussions.apple.com/message/9226100) regarding the speed difference between AppleScript text handling in OS X 10.5 compared with 10.4.11.
I have recently written a script to search through a text file which is an xml file exported from WorkGroup Manager. The file, which is approximately 1.8 MB, contains all the user names on the school server (just over 1720 of them), their settings and any other information we have added. After adapting some script ideas (using text delimiters and offsets) which I found on the internet to assist with counting the number of users and searching through the information of each one, one at a time, I have a script which works far in excess of my expectations in terms of speed when run under OS X 10.4, but runs slower than molasses in winter under 10.5.
The script counts the number of accounts, extracts each user's log-in name and also their actual name (which we have entered under a 'general info' or 'comments' field - I can't remember exactly where, but it is stored in the file), makes up a complete list of all account names (with the actual name, if present) and also makes up a subset of this information into a separate list which contains only the log-in names of those whose actual name has not yet been recorded on the server, then saves both lists to separate text files.
My original attempts, using some rather clumsy text searching and comparison techniques, took about 1-2 minutes to go through the whole procedure. After some internet searching, head-scratching and a bit more more work, the finished script, when run on my G5 under OS X 10.4.11, takes less than 3 seconds to do all I have described above, including the writing to text files. To say I was pleased would be an understatement!
Because the school/work environment, where the script would be run, is all OS X 10.5 or higher, I thought I should test it out under at least OS X 10.5. The script was developed on my DP 2.5GHz G5 with 8GB RAM running OS X 10.4.11. Using a fresh, clean installation of 10.5 I ran the script and was extremely disappointed. After letting it run for more than 20 minutes and still not finishing, I force quit AppleScript and reduced the number of accounts in the file. 40 accounts took 3 seconds, 60 accounts took 6 seconds, 80 took 11 seconds, 100 took 19 seconds and 120 took 27 seconds. I eventually let the script run right through - total time taken to process 1720 users was 65 minutes, compared to 3 seconds under 10.4.11!
Given that it was tested on the same Mac, with the same amount of RAM, using the same script and the same original text file, the only variable left (that I can think of) is the change of OS version - 10.4.11 vs 10.5.
As was pointed out to me in my previous post, AppleScript in OS X 10.5 handles all text as Unicode and has a greater overhead in processing time as a result. I have implemented the various bits of advice offered by respondents to my original post and changed the way I handled lists, etc. Obviously, if the script works so speedily under 10.4.11, I must have done something right in terms of code optimization/efficiency. It's when that exact same script is run under OS X 10.5 that it slows down incredibly. I even tried it on a 2.66GHz Intel Core 2 Duo iMac running 10.5.8 - it still took 40 minutes and Activity Monitor showed CPU usage by Script Editor constantly above 80% (often well above 90%). Saving the script as an application made no difference in the time taken.
Does anybody have any knowledge about what makes AppleScript Unicode-only text handling so slow? In this case, it is 1300 times slower! Is there any way of coercing/restricting the text handling/parsing to ASCII? If I really have to, I will set up a humble eMac at school with 10.4 on it just to handle large text files quickly with AppleScript, but I would prefer to be able to do it on the normal work Macs which have 10.5 or later on them. As mentioned, under 10.4.11 the script processes the 1.8MB text file with 1720 users and writes results to two files - all within 3 seconds, so I'm not really looking for coding suggestions unless they are directly related to what has changed in AppleScript under OS X 10.5. Without sounding too smug, the script works properly and speedily (at least in 10.4). I really would like to learn about the changes in AppleScript in OS X 10.5 and how to cope with or work around those changes.Hi,
text 3 thru 14 in largeText
character 3 thru 14 in largeText
text 3 in largeText
character 3 in largeText
These lines will be slow on Leopard
Getting some text in a variable that contains more than 60000 characters will be slower on Leopard,
but I don't know why it's slower
Here a test script.
script o
property t_text : ""
end script
set a to "abcdefghij"
set tResult to ""
repeat with i from 1 to 3
set o's t_text to a
repeat (item i of {17, 15, 14}) times
set o's t_text to o's t_text & o's t_text -- add characters in the variable
end repeat
set StartTime to current date
-- test
repeat 20 times
set b to text 3 thru 14 in o's t_text -- get a text in the variable
end repeat
-- end test
set EndTime to current date
set TimeTaken to EndTime - StartTime
set tResult to tResult & " Getting text in the variable which contains " & length of o's t_text & ", (20 times) = " & TimeTaken & " seconds." & return
end repeat
tResult
Here the result on my old G5, 2 x 1.8 GHZ
Getting text in the variable which contains 1310720 characters, (20 times) = 50 seconds.
Getting text in the variable which contains 327680 characters, (20 times) = 12 seconds.
Getting text in the variable which contains 163840 characters, (20 times) = 6 seconds.
The result on the same machine on Tiger is always less of one second.
Also, I try with 20 millions characters on Tiger, the result : getting text in the variable which contains 20971520 characters, (20 times) = 0 seconds.
The solution ( text item in a list)
Here the script
script o
property my_List : {}
end script
set OldDelims to text item delimiters
set RecordDelimiter to "::::::::::::::"
set LengthOfRecordDelimiter to length of RecordDelimiter
set o's my_List to findAll(read (choose file), RecordDelimiter)
on findAll(str, findString)
set Oldtid to text item delimiters
try
set text item delimiters to findString
if str does not contain findString then return {"Nothing found"}
set t to str's text items
set text item delimiters to Oldtid
return t
on error eMsg number eNum
set text item delimiters to Oldtid
error "Can't findAll: " & eMsg number eNum
end try
end findAll
set NumberOfrecords to (count o's my_List)
display dialog "There are " & NumberOfrecords & " accounts."
set StartTime to current date
set text item delimiters to ":"
set FullUserList to {}
set ListOfUnnamedUsers to {}
-- first user needs to be done separately as it is not preceded by RecordDelimiter
set EndOfHeader to "Standard:URL"
set LengthOfEndOfHeader to length of EndOfHeader
set EndOfHeaderOffset to the offset of EndOfHeader in (item 1 of o's my_List)
set OffsetToApply to EndOfHeaderOffset
set TextBeingChecked to text (OffsetToApply + LengthOfEndOfHeader + 1) thru -1 of (item 1 of o's my_List)
tell TextBeingChecked to set {UserName, NameForInfo} to {text item 1, text item 7}
if NameForInfo = "" then set end of ListOfUnnamedUsers to UserName & return
set end of FullUserList to (UserName & tab & NameForInfo & return)
-- now do all the others
repeat with CounterG from 2 to (NumberOfrecords - 1)
set TextBeingChecked to item CounterG of o's my_List
tell TextBeingChecked to set {UserName, NameForInfo} to {text item 1, text item 7}
if NameForInfo = "" then set end of ListOfUnnamedUsers to UserName & return
set end of FullUserList to (UserName & tab & NameForInfo & return)
end repeat
set o's my_List to {}
set text item delimiters to OldDelims
-- write results to file
-- 1). full user list
set TargetFile1 to (path to desktop folder as string) & "FullUserList1.txt"
try
open for access file TargetFile1 with write permission
on error
close access file TargetFile1
open for access file TargetFile1 with write permission
end try
set EndTime to current date
beep
set InfoToBeWrittenToFile to FullUserList as text
write InfoToBeWrittenToFile to file TargetFile1
close access file TargetFile1
-- 2). list of users without NameForInfo
set TargetFile2 to (path to desktop folder as string) & "UnnamedUsersList1.txt"
try
open for access file TargetFile2 with write permission
on error
close access file TargetFile2
open for access file TargetFile2 with write permission
end try
set InfoToBeWrittenToFile to ListOfUnnamedUsers as text
write InfoToBeWrittenToFile to file TargetFile2
close access file TargetFile2
beep 3
set TimeTaken to EndTime - StartTime
set TimePerAccount to TimeTaken / NumberOfrecords
display dialog (NumberOfrecords & " accounts took " & TimeTaken & " seconds." & return & return & "That equals " & TimePerAccount & " seconds per account.") as string -
Why is my SSD showing 250mb/s difference between read and write...
So i have recently upgraded to a SSD in my 2011 MBP. 2.4Ghz i5 16Gb RAM. I swapped my HDD with a Samsung 840 Series 250Gb SSD, I noticed a huge speed bump. See attached photos. Read is clocked at 503MB/s peak, and Write is clocked at 260MB/s peak on the SSD. My Question is why is there a 250MB/s difference between read and write?? Using Black Magic Disk Speed test. Mac OS X 10.8.4 Beta.
ThanksWrites are performed very differently on SSD than they do on a hard drive, and it is common for SSDs to have lower write speeds than reads.
It's actually quite interesting if you're a geek: http://en.wikipedia.org/wiki/Write_amplification
As long as the speeds do match your manufacturer specification for the model (and they do: http://www.samsung.com/us/computer/memory-storage/MZ-7TD250BW ) , there is nothing to be concerned about. -
Difference between Oracle Testing Center and Prometric?
what is the Difference between Oracle Testing Center and Prometric?
Notes for an Oracle Testing Center are here:
[http://education.oracle.com/pls/web_prod-plq-dad/db_pages.getpage?page_id=51&p_org_id=1001&lang=US#4]
The cancellation policies are possibly harder than a Standard Testing Center Vendor.
I would suggest that Oracle Testing Centers possilbly offer exams more on an event or batch basis; (Oracle Openworld is an example; though thats not what one would think of as an Oracle Test Center).
In general I suspect most people will find it just as easy to take the exam through a prometric(or new testing vendor) center. and there will often typically be more slots available. And the testing center will be typically be examing for other testing suppliers, perhaps mosting microsoft and cisco, but there's a mryiad of others out there as well. So the'll probably be well set up for it.
Here in the UK (south) we have a fairly (very) dense population. I've used 4 centers myself:
One 5 miles from me, a college, thats dual Pearson VUE/Prometric; though there only offering Pearson VUE at present until they moved to a bigger suite, with 4 stations. Nice and friendly. 5 days week.
One 25 miles from me, a training center, that offer dual Pearson VUE/Prometric; 4/8 stations; very friendly, cup of coffe offered; I usually go by Puff Puff to this one.
One 10 miles from me, maybe a 12 workstation suite, they offer usually prometric (but not oracle) on one a week. Felt Conveyor like compared to other two above; but very friendly and efficient.
One 35 miles from me, Prometric only including oracle only, maybe a 12 workstation suite, CRT's, and not necessarily of the best quality. This one really felt conveyor like to me, though staff were friendly. This is effectively a drive for me. Also whereas the others I've usd sit one down to sign the forms in a room this one was done at building reception.
The city center ones can sometimes be a little noisy and earplugs are recommended, though the one city center one I've used has provided them others don't have to.
In general from once I used a particular center I feel more comfortable; I'll know exactly where it is; where I have have a quick cup of coffee (with sugar) beforehand going over notes. This all helps me to be a little less anxious before the exam. When I get that prepartion wrong, and I certainly did once, if probably cost me maybe 2/3/4 %.
Getting to know your local test center and routine is one reason why I encourage people to take 1z0-007 and 1z0-051 proctored so they know the procedure and get to know a local Promteric etc Test Center before taking a more advanced and expensive exam.
Rgds -bigdelboy.
PS: I expect comments from some people who live 100 (+) miles from a test center and have no alternative choice. And those in some places will probably say they feel they are treated like cattle by the test center. -
Any data on speed differences between 2.4 and 2.93 ghz MBP?
Has anyone seen any performance tests showing the difference between 2.4 and 2.93 ghz MBP? I've googled around and haven't found anything.
Check Bare Feats for benchmarks and do some Google searching. Logically, the difference is not likely more than the difference in processor speed, plus or minus.
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Difference between unit testing and integration testing
What is the difference between unit testing and integration testing in SAP? Is unit testing takes place in Dev client and integration testing takes place in QA system?
Please clarify
thanksHello Krishen,
unit testing means veryfiingsmall / the smallet pieces of software, while integration testing checks the overall functionality of applications. Within the AS ABAP the tool ECATT + manual tests is used for integration tests and the ABAP Unit language integration for unit testing.
When, Who, Where tests are carried out is ultimately a personal decision. As unit tests are operate even under heavy development they are often the first choice for developers, but the unit tests can also serve for regression tests over a long period. Integration tests tend too be created and executed in later stages as they require often a certain majurity of the software under test.
Beside the mentioned links you may check out ABAP Unit infos also in the Wiki.
https://wiki.sdn.sap.com/wiki/display/HOME/ABAP+Unit
Best Regards
Klaus
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