WLAN for a Warehouse

Hi,
We are taking over a new warehouse in the next few months. The business has a requirement for total Wireless Coverage on the Warehouse shop floor for use by stock pickers (with mobile devices). The key challenge I see here is the fact that the racking will block/reflect the RF signal. This can be addressed by using many many APs with directional antennae. I was wondering if anyone out there has any other tips for deploying a WLAN in a warehouse environment.
Cheers
Marcus

Hi Marcus,
Jeff's got a good point.
If I may be allowed to make some additions, how do you plan to power your AP's? Will you be using a Wireless LAN Controller?
AP's (1240 for instance) require 15.4 watts of power. You can get a PoE switch, power brick/injector or a mid-span switch. The 1250, in Autonomous mode, requires 18.4 watts of power. If you are using a Wireless LAN Controller, the 1250 can operate at 15.4 watts of power.
1240/1250 series are "ruggedized" version AP's. They have full metal enclosures and have multiple antennaes. During the pre-purchase stage, you have the option to choose a wide assortment of antenna to employ from Rubber Duckies to the rods and (the extreme) the dish.
I am not sure if this has been brought up to you but with a Wireless LAN, you can also gain the optional benefit of two other functions:
1. Wireless VoIP;
2. Asset Location and/or Asset Tracking
Hope this helps.

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Hi everybody,
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I have two categories of buildings to cover : warehouses and offices
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I was wondering about the need to create 2 different wlans/SSIDs for the 2 environments. In the previous Wi-Fi architectures that i have seen there were often different SSIDs for Warehouses & Offices, but i can't really see the advantage of doing this.
The RF Scanners are quite recent and support the same security standards that we will use for laprops (i.e. WPA2 Enterprise with EAP-TLS authentication and AES encryption)
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I guess 2 wlans is always more complicated to manage than 1 unique wlan, so as of today I don't really see any advantage of creating 2 wlans.
What do you think about it ?
Thanks in advance for your help
Gabriel

I have two categories of buildings to cover : warehouses and offices
I hope you will be running WLC that can support 7.2.110.0 because there's an option called RF profiles. You may want to consider, for example, the WAPs in the warehouse to run particular RF profiles while your office run different RF profiles.
The RF Scanners are quite recent and support the same security standards that we will use for laprops
Sorry, but I would be apprehensive to believe what the marketing people say until you've personally tested the roaming of these scanners. There are still some very expensive scanners which will only talk in 1 Mbps in 802.11 b, PSK, and SSID should NOT be broadcasting.

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what kind of application changes involve with such an implementation and so on?
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Adi,
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Hello everyone,
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Regards,
Terence

I think you're better off using H-REAP/FlexConnect.

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Hi,
Does anyone know how the DAO pattern looks like when it is used for a data warehouse rather than a normal transactional database?
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In my opinion, there are no differences in the Data Access Object design pattern which have any thing to do with any characteristic of its implementation or the storage format of the data the pattern is designed to function with.
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The best AP for large warehouse deployment ?

Hi,
Hope you peeps can assist.
New design / installation at a warehouse....
What is the best / recommended AP for a warehouse with shelving 10m high and 1.8m appart and a ceiling at about 11.5m? Warehouse is 129m x 97m, about 60% of the floor will be shelving and the rest offices with a ceiling of 3m.
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David

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-Scott

RMAN crosscheck and expire guidelines for data warehouse environment

O/S: Windows Server 2008
DB: Oracle 11gR2
Are there any guidelines to how often one should do a RMAN crosscheck and set an expiration on archivelogs for data warehouse environments?
It would seem once a day would be enough for the crosscheck in a data warehouse environment that gets refreshed nightly. Expiration I would expect no less than 1 week.
Cheers!

I agree with damorgan
refer the below links for best practices.
http://www.oracle.com/technetwork/database/features/availability/311394-132335.pdf
https://blogs.oracle.com/datawarehousing/entry/data_warehouse_in_archivelog_m
Hope this helps,
Regards
http://www.oracleracepxert.com
Understand the Power of Oracle RMAN
http://www.oracleracexpert.com/2011/10/understand-power-of-oracle-rman.html
Duplicating RAC database using RMAN
http://www.oracleracexpert.com/2009/12/duplicate-rac-database-using-rman.html

RAC for Data Warehouse

Hello,
We have a research project for restructructuring our data warehouse system.
I would like to get some opinions about whether RAC architecture can be
a good solution for Data Warehouse application.
We have using parallel queries massively. Does running these kind of queries
on different servers on RAC with multiple server result in performance degradation rather than
running on single monolithic server with multiple CPUs
I will appreciate any comments using RAC architecture for Data Warehouse
systems?
Regards,

Maurice Muller wrote:
Just keep in mind that during the last 4 years (I guess your current system is about 4 years old) the CPUs became much faster.
A cpu can't work without data which means that the I throughput has to be fast enough to feed all your cores with data.
The main bottleneck of all DWHs I have seen during the last 8 years was allways the IO never the CPUs. And not just data warehousing Maurice, but a basic principle for any data processing platform - the slowest layer is always the I/O layer.. and can be the most expensive one to solve too.
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You can also replace a dual core dual CPU nodes with a 6 core AMD Istanbul CPUs next year.. and possibly 12 core CPUs year after that. So even a smallish 4 node cluster with 16 cores in total can be grown significantly and remain a 4 node cluster. Together with advances in HPC (High Performance Computing) like Infiniband.
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Technology is inevitable, as is the growth in data volumes. And I cannot see a non-RAC architecture rising to that challenge. Especially not in something like data warehousing.

Are analytic functions usefull only for data warehouses?

Hi,
I deal with reporting queries on Oracle databases but I don't work on Data Warehouses, thus I'd like to know if learning to use analytic functions (sql for anaylis such as rollup, cube, grouping, ...) might be usefull in helping me to develop better reports or if analytic functions are usually usefull only for data warehouses queries. I mean are rollup, cube, grouping, ... usefull also on operational database or do they make sense only on DWH?
Thanks!

Mark1970 wrote:
thus does it worth learning them for improving report queries also not on DHW but on common operational databases?Why pigeonhole report queries as "+operational+" or "+data warehouse+"?
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Data processing and data reporting requirements not not care what label you assign to your database.
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Analytical SQL is a tool in the developer toolbox. It would be unwise to remove it from the toolbox, thinking that it is not applicable and won't be needed for the work that's to be done.

Example database for data warehouse

Hi!
Does anybody know where can be found exaple database for data warehouse?
- schema is good
- schema with data is better
Best regards

slkLinuxUser wrote:
Hi!
Does anybody know where can be found exaple database for data warehouse?
- schema is good
- schema with data is better
Best regardsJust like an OLTP database, the schema design and its data is 100% dependant on the business needs and (if done properly) the result of a thorough data analysis. Any kind of a pre-designed sample would be near worthless to any actual application.

OBE for Data Warehouse 9.2

Dear All
Can anyone tell me the link of Oracle By Example: Hands on Tutorials for Data Warehouse 9.2.
I have found Oracle By Example: Hands On Tutorials Data Warehouse OWB 10g release 1, 10g release 2 and 11g at the following link
http://www.oracle.com/technology/obe/admin/owb_main.html
Thanks in Advance.
Best Regards
Thunder2777

Dear Dallan
I was looking for the Oracle By Example sort of tutorials for OWB 9.2.
Actually I want to learn OWB form 9.2 to 10.2. I have OWB 10.1 and OWB 10.2,
what missing was OWB 9.2.
That's why I have put it on forum so that anyone who knows where they can guide me.
But your comment that there is a little difference in OWB 9.2 and OWB 10.1, if I won't get
OWB 9.2 then it's better to start with OWB 10.1.
Ayway Thanks.
Thunder2777

Unable to disconnect from WLAN for E71

Hi,
I am unable to disconnect from WLAN for E71 and need to switch off and again switch on to disconnect. Is there a way to disconnect from WLAN without switching off the mobile?
Regards
Naveen

on the main screen of ur mobile u can see an option search wlan, when u want disconnect ur wlan click on that then u have a menu through that menu u can disconnect ur connection. or go to menu->control panel->connectivity->assistent wlan-> there u can select ur connected ap and deconnect it.
¨Arm yourself because no one else here will save you¨

Is RAC suited for Data Warehouse

Hi,
I have to provide a best architecture for our data warehouse project, as i googled , i found documents about Oracle RAC for Data Warehouse and features that Oracle RAC provide for a warehouse environment, like performane, availability ...
But i see some document that says , Oracle RAC is not best choice for data warehousing.
I want to provide flexible design that don't need to change after years. but our resources are limited, we have two IBM Power7 servers with 32cores and 62GB ram, we estimate about 1 to 2TB data yearly that should upload into warehouse, because each server just have 62GB ram, what should we do?
Implementing Oracle RAC or just running warehouse on sigle-instance database on one server and just increase the resources of that server?

VahidS wrote:
Hi,
I have to provide a best architecture for our data warehouse project, as i googled , i found documents about Oracle RAC for Data Warehouse and features that Oracle RAC provide for a warehouse environment, like performane, availability ...
But i see some document that says , Oracle RAC is not best choice for data warehousing.
I want to provide flexible design that don't need to change after years. but our resources are limited, we have two IBM Power7 servers with 32cores and 62GB ram, we estimate about 1 to 2TB data yearly that should upload into warehouse, because each server just have 62GB ram, what should we do?
Implementing Oracle RAC or just running warehouse on sigle-instance database on one server and just increase the resources of that server?
I am not sure that which documents you have read based on which you have got the impression that RAC is for DWH. RAC is a part of the Oracle's High Availability solution architecture. It's not designed to cater any specific kind of workload but to provide HA in the case of a node or instance crash. And also, RAC itself doesn't give any performance benefit. If you have a database which is poorly performing, it would remain the same or may be , will become even worse after implementing RAC due to too many things being involved in the architecture now e.g storage, network etc. So if you do want to implement RAC, give it a careful thought, do some testing and then only project it. If you are determined to go for RAC and you are a pure DWH shop, I would suggest to go fro Exadata running RAC . Smart Scan, Compression are just few of those benefits which would come with Exadata along with the RAC's HA solution that would be serving better for your requirements.
HTH
Aman....

MRP for different warehouses

Hi,
I have two warehouses, and all my items resides in both warehouses. and i have defined a min-max level for a particular item X at both warehouse i.e A and B, 10 and 20 respectively.Initial stock is zero for this item.
Now, I want to run MRP wizard for planning of item X only for A warehouse for a single day, I checked only A warehouse in the existing stock drop down list in MRP wizard, when i run that wizard it shows me the recommendation for 30 items (10 for A and 20 for B) to be purchased which incliudes the minimum level of another warehouse B. But i have checked only A warehouse to which i have to planned my requirement.
Please respond ASAP.
Yogesh Gaur

I think that checking the warehouse is for accepting the current stock only, and not for the requirements. For example if you have a sales order for an unchecked warehouse, the MRP will count its requirement too. And this is the case with the minimal stock level too. It works this way.

WLAN for a Warehouse

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